Hi,
I completely understand your concerns. I just purchased CuteEditor for php and was concerned myself because we need special functionality ourselves. I am developing an email marketing/contact management system which allows users to modify existing templates. I am a php developer and i can tell you one thing i was completely impressed with CuteEditor's ease of integration. It truly does plug right into your existing system and assigning text/html to it to be edited and also retreiving the edited content is a piece of cake. I had braced myself for the worse but ended up getting a hold of it's concepts and customization in a really short period of time. I do have couple glitches which i am working on and need help on, however other than that I do recommend it and please do not hesitate to contact me if you have other questions. I understand your reservations since they don't offer a trial version, which i think the company really needs to consider.