Did you use the compatible card? I was going to go for a genuine Digium product due to all the problems I had with a clone X100P, do you think the compatibles are okay?
I have in the past used both the Digium TDM and the Atcom AX400p, and i found they were both identical in performance and quality, You could even interchange the atcom modules between the atcom and the digium cards. So with the Atcom AX400p being alot less money for the exact same quality i would advise you go with that.