Note: I'm reviewing a VPS I received for free (http://www.lowendtalk.com/discussion/8512/offering-a-few-free-vps) from @ShardHost, however this should (at least) represent the quality of paid service.
I currently have the 512MB package. The server performs very well. I'm currently hosting a private VPN and developing websites on it, so I need great uptime and network connectivity, and this VPS has both of them. I've had no uptime issues so far, and support has been great. The only ticket I had was for PPP, which did not work from SolusVM right away. Staff responded to my ticket very quickly (~30 mins), considering that it was Sunday; they also admitted that they didn't enable the required kernel modules and fixed the issue right away.
CPU model : Intel(R) Xeon(R) CPU E31240 @ 3.30GHz Number of cores : 2 CPU frequency : 3299.882 MHz Total amount of ram : 512 MB Total amount of swap : 512 MB System uptime : 8 days, 21:03, Download speed from CacheFly: 52.3MB/s Download speed from Coloat, Atlanta GA: 36.9MB/s Download speed from Softlayer, Dallas, TX: 67.4MB/s Download speed from Linode, Tokyo, JP: 2.06MB/s Download speed from Linode, London, UK: 2.39MB/s Download speed from Leaseweb, Haarlem, NL: 8.03MB/s Download speed from Softlayer, Singapore: 3.98MB/s Download speed from Softlayer, Seattle, WA: 13.3MB/s Download speed from Softlayer, San Jose, CA: 13.8MB/s Download speed from Softlayer, Washington, DC: 18.3MB/s I/O speed : 193 MB/s
It has been a very pleasant experience so far, and I hope it will remain the same in the forseeable future