Anyone every purchase / use hardware from <http://SiliconMechanics.com>?

Their prices seem to be unbeatable.

So I'm curious to know how reliable their servers are.

**Also, who do you recommend to buy the best bang for your buck on rack servers?**
['https://serverfault.com/questions/31361', 'https://serverfault.com', 'https://serverfault.com/users/-1/']
I have a Silicon Mechanics rack mount that I bought used. It is a dual socket Opteron system with a 3ware raid controller and I have had no hardware problems with it. A friend bought some used on Ebay and those have worked without hardware issues. My former employer has a dozen Silicon Mechanics boxes that they use for Test and Production. The only problems those boxes every had were software issues with our own code.

If I were looking for new servers, I would put them high on the list of vendors to get quotes from.
I bought 3 servers from them probably 3 years ago. 

2 servers had the (cheap plastic) rabbit ears break off almost immediately. One server was RMA'd. 

In terms of operations and not cheap plastic case addons, they've been reliable machines. I've heard their quality has improved from the models I bought.