Update on this..
I was able to get the Axis 20 instead of the 40. Only because I also got an extra Nero 3, so there's too many pumps in my tiny cube lol.
Pros: Being a DC pump, I plugged it to my ice cap battery backpack with one of the Nero 3s. I set the power to off and I was able to run those two pumps at regular speed (both at 30%) for about four days. Huge bonus!
App control is a huge plus since I have several AI products already. The pump is shorter than the Axis 40, which allows me to add the extra Nero3 to that part of the back wall.
Cons: Attaching a variable flow outlet for wave control wasn't really effective even at max speed. There is no pulse mode and wave mode which the Mighty Jet and the IOAIO alternative pump (which is half-price of the Axis) have.
All in all, if you're not invested in AquaIllumination and need to update your return pump, I'd still recommend a Mighty Jet or IOAIO for the pulse and wave function. But if you're knee deep in AI products in your tank, Axis is a no-brainer. A DC return pump is really a must have upgrade with the battery packs available in the market place for making sure the tank is at least pushing water when there is power outage (one of my worst fears, really).