Last week I got a HDSPe AIO and I have to say that it is the greatest piece of gear I bought for ages!
Fast as a shark...
I want to thank the engineers of RME, because it solved 99% of the problems I had with my DAW.
There is only one thing that could be optimized: Probably you put some insulating tape into the package, because typically you need it in order to deal with hiss and hum. I yielded to despair and used band-aid...