Stratus doesn't live up to the marketing
This would be great if Stratus was a clean and transparent hardware solution; but it isn't.
The Stratus Windows 2003 install relies on a *lot* of proprietary drivers and is hooked into Windows on such a fundamental level that upgrading Windows patches can break the Stratus drivers! I have seen nodes randomly rebooting *both sides* of an FTserver after installing a regular set of patches. Stratus' software is also only rarely updated, which means you have to wait for Stratus to give you a thumbs up on any Microsoft updates you want to install.
Not to mention that a Stratus server with 2-year old hardware (2xdual core Core 2 Duo and 4GB of RAM with SATA, yes, SATA disks) costs over £15000!!! How is that scalable? Why not buy 10 commodity servers instead? Not to mention that your pathetic 4 core server is taking 4U of rack space!! I can get 8 cores in 1U, why do I want this?
All in all I cannot support Stratus and having worked with them for a couple of years I have seen no reason to approach them again whatsoever. They happen to be the only vendor in this particular market but that doesn't mean that they have a good product.
All in all another case of good marketing, bad product. Stay well away....