I often find it difficult to find straight up advice for gear on the net so I thought I'd collate mine about the BMI Shuttle here.
First of all- most importantly- THIS IS NOT CURRENTLY A 1080P RECORDING SOLUTION. Do not buy this if you're looking to record gameplay footage in 1080p... right now.
They claim it is, but the firmware only allows up to 1080p at 30 FPS. Coupled with the restriction that you have to manually set the frame rate and definition yourself or the shuttle will fail to capture, you already have a big issue here. It simply cannot see an Xbox or a PS3 at 1080p.
BM have said several times the hardware in the shuttle is up to it and as USB3.0 improves they will release new firmware for it to do so. But they've been saying that since 2010...
Which leads me onto the second problem: Research the shuttle (or any other BM product) before you buy it. I did and I knew my dell was up to it before purchasing, but it will only work with certain mobos and with certain USB3.0 adapters.
I also had a hard time getting the USB drivers up to the correct level for it to work: the site BM recommend did not have the driver I needed, thankfully Intel did.
Tonight I will start experimenting with 720p capping and getting it to work with Xsplit. I'm expecting a lot of trouble .
Although it still has many advantages over the hauppage, I must say I am disappointed with it, I find the situation with 1080p to be... unreasonable. They should give us the option, let me deal with my hard drive speeds and the like- people like me aren't going to be using uncompressed video anyway from the shuttle, Xsplit will be shrinking it to a much more reasonable size anyways, I reckon I could get it to work. Coupled with the fact that I bought it because of an issue with 720p downscaling causing too much lag for competitive gaming on a lagless 1080p monitor, it's a bit of a bugger.