I'm working on Step 9 at the moment and my code passed the Step 7 check, but I noticed something very odd.  Here is the problem:

1. I can add an intial review and the code does as requested and shows the review 
  

Behind the scenes a record is added to the BoatReview__C object


2. The problem occurs on adding a second review.  No matter if I change boats or add a review to the existing boat, all subsequent inserts actually update the original review.
 

Behind the scenes the Insert has actually done an Update on the original record


If I change boats and add a review record, the original boat review is updated and the Id and Boat Id stay the same.  It is as though I am not Committing the transaction.

Here is the code:
AddBoatReview.cmp

<aura:component implements="force:appHostable,flexipage:availableForAllPageTypes">
	<aura:attribute name="boat" type="Boat__c" access="public"/>
    <aura:attribute name="boatReview" type="BoatReview__c" access="private"
                    default="{'sobjectType':'BoatReview__c', 'Name':'', 'Comment__c':''}"/>    
	<aura:attribute name="boatReviewRecord" type="Object" access="public"/>
    <aura:attribute name="recordError" type="String" access="private"/>  

    <aura:handler name="init" value="{!this}" action="{!c.doInit}"/>
    
	<aura:registerEvent name="BoatReviewAdded" type="c:BoatReviewAdded"/>    
    
	<force:recordData aura:id="service"
    	layoutType="FULL"  
		fields="Id, Name, Comment__c, Boat__c"
		targetRecord="{!v.boatReviewRecord}"
		targetFields="{!v.boatReview}"
		targetError="{!v.recordError}"
        recordUpdated="{!c.onRecordUpdated}" />    
    
    <lightning:layout multipleRows="true">
		<lightning:layoutItem size="12" padding="around-small">
			<lightning:input name="title" label="Title" value="{!v.boatReview.Name}"/>
		</lightning:layoutItem>
		<lightning:layoutItem size="12" padding="around-small">
			<label class="slds-form-element__label" for="input-id-01">Comment</label>
			<lightning:inputRichText value="{!v.boatReview.Comment__c}" disabledCategories="FORMAT_FONT"/>
		</lightning:layoutItem>
        <lightning:layoutItem size="12" class="slds-align--absolute-center">
			<lightning:button iconName="utility:save" label="Submit" onclick="{!c.onSave}"/>
		</lightning:layoutItem>
	</lightning:layout> 
    
</aura:component>

AddBoatReviewController.js

({  
    doInit : function(component, event, helper) {       
		helper.onInit(component, event);
    },
   
    onSave : function(component, event, helper) {
//		component.set("v.boatReview.Boat__c",component.get("v.boat.Id"));
			
        component.find("service").saveRecord(function(saveResult) {
           console.log("Add Review status" + saveResult.state)
        		if (saveResult.state === "SUCCESS" || saveResult.state === "DRAFT") { 
        			var resultsToast = $A.get("e.force:showToast");
                    if(resultsToast != undefined) {    
                        resultsToast.setParams({
                        "title": "Saved",
                        "message": "Boat Review Created"
                        });
						resultsToast.fire(); 
                    } else {
                        alert('Boat Review Created');
                    }
				} else if (saveResult.state === "INCOMPLETE") {
                	console.log("User is offline, device doesn't support drafts.");
        		} else if (saveResult.state === "ERROR") {
            		console.log('Problem saving contact, error: ' +JSON.stringify(saveResult.error));
            	} else {
            		console.log('Unknown problem, state: ' + saveResult.state + ',error: ' + JSON.stringify(saveResult.error));
            	}                
			}
        ); 
		var BoatReviewAdded=component.getEvent("BoatReviewAdded");
        BoatReviewAdded.setParams ({"BoatId" : "ADDED"});
		BoatReviewAdded.fire();
		
        helper.onInit(component,event);   
	},        
    onRecordUpdated : function(component, event, helper) {
        var eventParams = event.getParams();
        if(eventParams.changeType === "CHANGED") {
            var changedFields = eventParams.changedFields;
            var saveResultsToast = $A.get("e.force:showToast");
                if(saveResultsToast!='undefined')
                {
                    saveResultsToast.setParams({
                        "title": "Saved",
                        "message": "Boat Review Saved"
                    });
                    saveResultsToast.fire(); 
                }
                else
                {
                    alert('Boat Review Saved');
                }
        }
    }
})

AddBoatReviewHelper.js

({
	onInit : function(component,event) {
        var boat=component.get("v.boat"); 
//        console.log("We have got the AddReview INIT OK" + boat.Id);  
        component.find("service").getNewRecord("BoatReview__c", // sObject type (entityApiName)
            	null, // recordTypeId
            	false, // skip cache?
            $A.getCallback(function() {
           		var rec = component.get("v.boatReview");
                   var error = component.get("v.recordError");                 
				if(error || (rec === null)) {
//            		console.log("Error initializing record template: " + error);
         		} else {
//                    console.log("We have initialised the AddReview OK" + boat.Id);                 
					component.set("v.boatReview.Boat__c",boat.Id);
         		}
			})
		);   
    }
})

I can complete the SuperBadge becuase the code passed the checker, but be good to know what I got wrong......thanks