I just had a google ... must admit they look interesting, bit difficult to home demo though
I wonder how they'd compare to what and if you're getting something that would otherwise be a much higher quality and a lot more expensive or if it's a relatively negligable saving.
My other concern would be if ever you wanted to move them on, I bet their 2nd hand value would be pants.
If I genuinely felt you were going to get a level of performance / considerably better that may otherwise be out of my price range, I'd definitely be up for it and having a project at the same time.
They mention no soldering required, if there were others that were even better but required soldering I'd be up for that as well.
EDIT: I just looked at prices again and added in the factory build, it's an extra £76 so it's not like it's a big saving.