I've heard the same thing about going to a 400 class heli. Much more stable in hover and flight. Between parts cost and shipping, I've already bought the MX400 and everything needed to fly. I hate waiting for parts. But hey, I'm not waiting for parts today! Still no word from the folks at the repair shop.
I do like being able to fly indoors. My days in the KC135 hangar are numbered. I am re-training into a contracting job. I'll only be able to fly my Airhogs Havoc in my office cube.[:@] I'm dying to get my little heli back. I have until late January and then off to the office cube I go.
Hopefully my friends back here in the hangar will let me come in and fly during lunch.

The AXE CP has a lot of good characteristics. For the most part I've had to order parts from Tower Hobbies since the two rc stores in Montana don't carry anything by Heli-Max. Upgrade parts are out there if you look for them.
The Axe CP is best kept indoors. Any wind above 3 to 5 mph will toss the AXE CP around like the SS Minow.
Hope this helps a little.
Ted