Its the Transaction support, as well as being able to instantly retrieve the Identity of a newly added record, and "scaffolds" on steroids that made me switch from SubSonic a Free tool, to ES. This just seems complete.
And don't get me wrong, I may post a bunch of "How do I..." in the Forums, but there's always a learning curve for any new tool. And so far I love it.
Thanks.
King Wilder
http://www.kingwilder.com