I have used:
Cali (ok) - reportedly US-05, though I'm not convinced, as it seems slightly different
German (solid) - basically 34/70, I think
Baja (decent) - might be Modelo's or a slight downgrade of it; it has been solid enough but not necessarily amazing as I had hoped
I just got a packet of Monk (Belgian trappist??) which I will be trying out in the coming months for Tripel, Quad, and other experiments. My experiences with the other Cellar Science products were good enough to convince me to try out Monk.
The prices are easy to like, and the beers have all turned out solid enoough (so far), but I have other dry yeasts (Diamond, S-189, Verdant, Koln, etc) that I like a bit better, so I am not sure how often I'll use CS yeast.