That's good to hear that they replaced your equipment quickly, but it's a little concerning that so many pieces went bad already...
One thing I'm not sure if anyone has touched on in your thread is keeping an "emergency parts" supply. It's generally a good idea to have backup vital equipment in case an issue pops up. Often times it will take at least a few days to a week for a pump or skimmer to get swapped out under warranty. That's enough time for your tank to go south in a big way.
Personally I keep a new back up of the following in my fish closet and my tank is just a little 80g:
Return Pump fully plumbed to the Union
Heater
Skimmer Pump
Apex Base
Kessil
MP40QD Wet Side
Dosing Pump Tube
Various plumping pipe, fittings, etc.
I've got 2 return pumps, 2 skimmer pumps, 6 lights. Plenty of redundancy built in.