I host with them for a week now.
Lesane-crooks.com (my currently host) is not hosted by viperhost, my new host wich will be online next week is hosted by viperhost.com. The support is excellent and i hear from alot of people that viperhost is a great fast host wich has a great uptime and more. You should visit the forum and view some reactions about the hosting and visit some websites from their customers and you will see it yourself.
I have the rs1 package.
The owner of viperhost.com is a moderator on vbulletin.org
Guess who?