Yeah, I'd never get shipping without tracking, but I've never had a bad experience with Monoprice, even dealing with them with a problem, though it wasn't related to the tablets, it's worth saying. I'm sorry you had a bad experience though, and I'm not saying that the company's perfect -- but then, no company really is! I wouldn't recommend all products sold by Monoprice, but their brand items have worked well for me in any case.
But yes, definitely always get tracking!