I have this, and I love it:
http://www.gopresto.com/products/products.php?stock=06020
It's not a crockpot per se. I guess it's a slow cooker?
There's nothing I cook it in that can be overcooked. I use it to make stews overnight, mostly, and also to do stocks, so it's for those 12-20 hour simmer dishes with the tough cuts of meat. I never put it on in the morning for that night's dinner, since I find there's too much prep work in the morning.
It has a very sensitive temperature setting (you set for X degrees, unlike some versions I've seen which have a high/medium/low setting). It has a safety cable which cuts out if it is knocked over. You can also use it as a deep fryer, although I never have. Apparently it can also be used as a rice steamer.