The Tholian ship is the first alien one I've bought, it's the only alien one that I wanted from the start of the collection and I'm pleased with it. The only problems I've had have been with the starfleet ones, the NX-01's nacelles aren't as straight as they could have been and my Excelsior looks badly cobbled together. Mind you the Excelsior was more a random buy, didn't want it as much. The rest are just fine, got the Prometheus last week and there's nothing wrong with it. I admit I'm not the biggest fan of where they put the seperations of the various parts, and they're getting a lot more noticable, but still, I like what I have so far.