The basic question: Is Jitterbit Data Loader for Salesforce a better data loader than Apex Data Loader?

The deciding factors for us would be performance, stability, ease of configuration, and vendor support

I am looking for insight from someone who has used both and would like to get your opinion about which one you prefer and why

This is how we use Apex Data Loader today...
- Bulk Load .csv files into the cloud
- Insert, Update, Upsert, Delete, Export
- Called via Shell script from SSIS

A key feature of the Apex data Loader that makes it work for us today is this:
The ability to edit the "config.properties" file

For example...
We have found it necessary to tweak the following settings on an object by object, operation by operation basis to achieve the required level of performance and still stay within Salesforce API usage metering limits:
dataAccess.writeBatchSize
dataAccess.readBatchSize
sfdc.loadBatchSize
sfdc.extractionRequestSize

Does Jitterbit allow for this same level of configuration?

Thank you in advance for any insight you can offer!

The basic question: Is Jitterbit Data Loader for Salesforce a better data loader than Apex Data Loader?

The deciding factors for us would be performance, stability, ease of configuration, and vendor support

I am looking for insight from someone who has used both and would like to get your opinion about which one you prefer and why

This is how we use Apex Data Loader today...
- Bulk Load .csv files into the cloud
- Insert, Update, Upsert, Delete, Export
- Called via Shell script from SSIS

A key feature of the Apex data Loader that makes it work for us today is this:
The ability to edit the "config.properties" file

For example...
We have found it necessary to tweak the following settings on an object by object, operation by operation basis to achieve the required level of performance and still stay within Salesforce API usage metering limits:
dataAccess.writeBatchSize
dataAccess.readBatchSize
sfdc.loadBatchSize
sfdc.extractionRequestSize

Does Jitterbit allow for this same level of configuration?

Thank you in advance for any insight you can offer!