I've had a couple of problems with mine...
First of all, the fence doesn't seem to be parallel to the blade, so joints need a fair amount of sanding after glue-up. I don't know whether the fence can be adjusted so instead I use thin scraps underneath the jointer and forget the fence altogether. Which is fine for standard 90 degree work of course...
The second gripe I have with this tool again involves using the fence. I find I can lock the depth setting as tight as I like (without over-tightening!) and yet, after the first few boards have been done, I'll look back and realise the setting has moved so that some joints are lower than others and, therefore, the boards don't line up.
The numbers of times I've had to recut the slots and inserts TWO biscuits, I could tell you...
Aside from this, though, it seems pretty good value to me. :?