I've had good experience with my entry level and first folder.
http://www.bikeforums.net/folding-bikes/1019002-durban-bay-pro-7-review.html

They are on sale for $200 at target with free shipping.
http://m.target.com/bp/durban

That being said, at some point I will be getting a nicer (more expensive) folder. I have found folders to be very useful.