Latency
I think I may just have 1.0, but I constantly use my 428 with it without any problem. Latency usually appears after recording, but is easily corrected (drag tracks to align with starting point). I think there's even an option to turn off the correction if needed. This might not have answered your question--I understand there's myriad other concerns with latency out there, but for my applications, it's never presented a real problem.