I have a Ridgid portable table saw. In my opinion it is great! Straight cuts, doesn't ever bog down, portable and light enough to move when I need to get it some place else.
That being said it does have some drawbacks. Its not a cabinet saw, if you are trying to making fine furniture your not going to get the cuts you require, but its not made for that either. I personally dont like the fence, its not as rock solid as I would like so I end up checking it after every cut to make sure its still correct. But for ripping plywood and doing those complex double mitered cuts that only a table saw can really do it works great! Fits in my small workshop (aka the garage) and folds up when the wife needs to pull her car in.