I've been a member and avid user of GSA for quite some time now and never seemed to be able to find a decent vps provider. This led me to look into it and start offering friends the service.
Now a over 6 month's on and we've seen nothing but great results.
We used to offer a ton of different options but now we only offer the one. The server's are based in the EU and the spec's are more than ample for GSA and other SEO tools.
Please note the spec's will also be increasing soon (i.e. More RAM, we are planning on upgrading users to 7-8gb instead of 5).
I am happy to setup a VPS or two for people to login and have a play around with. So far we've had no-one complain about the VPS's and hope to keep it that way.
Figured I would post in here just to see what sort of interest we get.
We are always looking to improve so feedback is more than welcome.