Indeed, certainly worth it. It's usually taken me a few days (at least) to get comfortable when switching to a new 3D app. Silo took about 4 hours. And being able to sculpt and poly model at the same time is huge.
excelent news, I start to look also for SILO since few days. Pretty fun soft. Just trying his Topology Brush. When next version 2.1 will be realize - I 'll buy it. I've heart that Nevercenter Team is only 2 or 3 guys ... BRAVO. ( pitty that there's not yet a displacement map generation)
I quite like it, especially for the price. I can't see myself ditching 3ds Max for it, but it'd be a nice tool to add to my repetoire. Thanks for the link!