I have been using LLBLGen Pro on a project for the last couple months and have grown to see it as a tool I consider indispensable. As I've said before, it hits the sweet spot between control, power, and cost. The newest version has added some features (and fixed some bugs) and Frans has made it much easier for you to install and see just exactly what the real implications are to you and your work.
The demo version is now a 14-day trial that you can use on your own databases to see exactly what it will be like to work with your data via LLBLGen Pro. The previous demo version did not expire but only worked with Northwind. While Northwind is a good database for a demo like this, it just isn't the same as playing with your data. Now you can.
The documentation for getting started is more than sufficient and Frans will answer any questions you might have, but if you have any questions you'd rather ask a 3rd party, feel free to email me and I'll try to help if I can.
[update] I forgot to mention that Oracle 10g and Firebird 1.x/Interbase 6.0 support has been added. More Details on Fran's site.