Some reviewers of other Bear Crawl models said their parts came with some poor welds or finish. But mine came perfect. I didn't even originally see the extension kit for the extension legs or I would have ordered it to begin with. I just ordered it now. One thing about this version of the crawl, the all-swivel version, all 4 corners have foot levers. So, if one of the places you need to put your equipment is in a corner, it might be hard to get your foot into the corner to do the lift. It looks like the standard version only has two foot levers. If I had noticed that, I think I would have got the standard version instead. I'm surprised that there is a 300 lb difference in rating between this and the standard. But, this is still plenty for me. My table saw is about 500 lbs, so, this will handle it. The parts are very strong. The Q&A on the standard version says it adds about 1/2". Well, this seems to add an inch or thereabouts. And I suspect the standard does as well and the Q&A is wrong.