Tech support and cycler swap outs from NXStage are fast and almost pain free. We've had three swap outs so far...and the last one they delivered on Labor Day!
The only minor complaint that has happened every time for us is...when they swap out the cycler-'someone' at NXStage schedules for the "bad" cycler to be picked up by UPS and sends out a call ticket for pick up. But, you guessed it, the courier has taken it every time and left us a receipt.
So we were left with UPS coming on multiple attempts to pick it up.
Now that I have the local zone rep for NXStage cell number...I just shoot him a text and we're good to go!