* Their 90-day money back guarantee only applies if they have failed to meet industry standards for performance and reliability. So, if you just don't like the service, you're out of luck.
* Their 90-day money back guarantee actually doesn't give you your money back! They give you a pro-rated refund of your charges for that month. So, even if you can argue to them that they are slow and unreliable, you'll still only get a refund of your unused portion.
Maybe they are really good, but their public presentation leaves a little to be desired. I'm ok if someone doesn't want to offer a money-back guarantee. However, why word something so poorly? A pro-rated refund is not a money-back guarantee.
Going into their order system, they're definitely cheap - they divided their costs by 100! So, that $53 level becomes $0.53! It just seems like they don't have their act together. It could just be that they put all their effort into the product itself and didn't pay attention to the other details, but it isn't a great way to run a business.
The price isn't a mistake: "CURRENT SPECIAL: 99% off the first month on Virtual Private Server and Dynamic Dedicated Server VPS accounts! Discount automatically applied at checkout. The next 80 orders will receive this discount."
http://www.tektonic.net/vps.php
I haven't done any performance comparison. (since I don't use other hosting services.)
But as far as raw resources per dollar, Tektonic has both Slicehost and Linode beaten.