I've only used mine 5 or 6 times but works great for cutting gears and doesn't sit too high which is why I got a 6" instead of 8". I would imagine you could overstress it if you tried deep or fast cuts but we're hobbyists right.
I just weighed mine on my wife's bathroom scale and it says 26 lbs. Don't know if wife pounds are like dog years or not, but 26 lbs feels about right! I've had my Grizzly 6" rotary table about 9 months and it works flawlessly.