Personally, I don't like the way T-nuts work, the design seems so flawed. Hurricane nuts look better, but I wouldn't use them with out a little adhesive on them. It's a real pain in the butt when one of them looses grip and you can't get it out.

Those threaded inserts are pretty cool. They work well in plywood and solid woods. They are crap in MDF or particle board, especially close to an edge. I just don't like the idea of something that threads into the wood to thread a bolt into it.