It's a Slik U8000. It feels pretty firm on the ground and damps vibration well. The locks on the head are chunky and feel secure. The one complaint that I have is that the pan-handle is a little long and gets in the way a bit when I'm looking through the viewfinder. I might actually end up chopping an inch and a half off the end if it gets too annoying.
Yeah... I've got an el-cheapo tripod I bought off Amazon for about $50. It's got good height, but it's rickety and a similar style of head as yours. I'm starting to look at upgrading to a "real" tripod, but with the head and everything it's like I've got the choice of a new lens or a tripod and I just can't justify it yet.
This is why I like bricks-and-mortar stores. I got to set it up myself and whack it test it's stability before parting with any cash. If I had any sense, I'd have asked them to put a camera on it and found out about the handle.
Well as far as stability of mine goes... it's not bad for normal stuff. I almost never use a tripod, but for no-wind situations it works fine. Amazon has a pretty awesome return policy, so I don't have a problem with ordering through them. But yeah... I love going in to the local camera store and testing things before I buy them.