I have one of the lightweight saws. A Delta, HD had them so cheap I felt it was perfect for my outdoor shop. I just cover it with a scrap of plywood and leave it outside in the elements. I do not expect it to last long with this type of abuse but that is the price I am willing to pay for the convience of not having to put away another large heavy power tool at the end of the day. Like most who own these little saws, most of my cutting is done with miter saw and a skillsaw with a straight edge. But once I have something cut down to a size that does not dwarf the little saw it does surprisingly well. I have used the little saw for ripping, cutting rabbit joints, etc in smaller stock. It actually does well on oak 1x2's and even 2x4 pine.
The little fence on this thing is surprisingly accurate too. It seems to lock square to the blade every time! Guess I'm just lucky there....
I feel the biggest drawback to using the small lightweight table saws is the size of the table itself. Seems my hands are always closer to the blade than on a larger saw. Always use feather boards and pushblocks when possiable. If an operation seems a bit risky on the little saw I will resort to a plane, router, skill saw or even a redesign of the project before I risk the loss of body parts to the saw.