They are neat little products with some quirks.
It will not be ideal for day shooting at ranges longer than 300 yards due to the decreasing clarity that digital zoom provides.
as for "holding zero" these don't work like a regular prism day optic. Zeroing a reticle is entirely a function of software, assuming the scope was assembled properly and is locked up tight to your rifle (which it should, though some users report having to Loctite some of the mounting screws - I did not experience this minor issue). So, assuming you zero properly using the software, then at any time should your zero "be off" then it's a software glitch. I've not experienced any issues with shifting zero, but if you did, you can simply plug in the zeroing coordinates in the software again and boom you're back to zero all things being equal. Lots of users don't understand how to zero properly.
Battery life depends on your choice of battery and how many of the whizbang features you use. Most users rely on aftermarket rechargeable lithium AAs or external packs. Store bought lithium AA's will get your 3-5 hours of continuous use in general. Longer run time needs aftermarket batteries.
Scope comes with an IR illuminator that isn't half bad. You will need it. Good to 200 yards for sure, more with ideal conditions. Aftermarket illuminator a can get you out to 400-500.
The more whizbang features you use the more glitches and issues you might run into. I've never experienced any just using the scope as a day or night scope (i.e. No wifi streaming, no ballistic calculator, no GPS).