I've been an Avare user for many years, both VFR and IFR, and generally like it a lot. It is pretty much the only EFB I use, flying multiple aircraft about 130 hrs/year, both VFR and IFR, almost always cross-country. I flew with Avarex last week and found it unusable in its current state. I tried, but it's just not there. It seems to me to be a heavily de-featured version of Avare with a crippled user interface.
In general, I find it provides less information and is more difficult to use. Trying to figure out how to configure something or find some information that is not readily available is time consuming and distracting, which are more or less the opposite of what you want from an EFB.
For me there were a number of issues, but the most notable I've listed below. Some are duplicates from what's been reported previously:
1. The numbers are missing from the distance rings. I use those a lot, including the 2 mile ring, which seems to be gone.
2. The barber pole and dashed direction indicators are gone from the position indicator. I use those a lot, too.
3. The map tiling appears to be broken. When I zoomed in all the way, which I do a lot to see text, details, etc., the map (sectional) disappeared completely. Traffic was still there, but the map was gone. During flight there were times when the map only appeared in a few scattered square patches, and times where big patches were missing in the map. This was one of the things that made it essentially unusable for flight. This was on a Galaxy Tab A8.
4. I fly with two tablets, one on a knee pad, and this is the one that I was trying AvareX on. It kept switching between landscape and portrait mode. I couldn't find a way to lock it in either orientation (which goes to the menu usability). This was another of the things that made it unusable for me.
5. There is a menu button, but it seems to dead-end on proving any utility for configuration, which one would expect to find there. There doesn't seem to be any easy route to configuring things or finding things. This is a big obstacle to usability.
6. I fly from a very busy airport, and there was a lot of traffic around when I started Avarex before I started the aircraft. It would not shut up about nearby traffic, and I couldn't find any way to stop (silence) the audio alerts without disabling the tablet audio completely. This is another configurability issue, I think. This was another issue that made it essentially unusable, and I had to stop it until I could try again after getting
airborne away from traffic.
7. The flight planning functions are very clunky. The controls are not easy to find, and saving, loading, and editing an existing plan still seems very difficult to figure out. I think a tool should be much easier to use.
8. Long ago I regularly used FltPlan Go, and the main reason I stopped using it was that in turbulence a piece of clothing or the tail of my seatbelt would occassionally tap the back button twice and exit the program. To me that's a bad enough thing, especially at a bad moment, that I stopped using it. Avare has the additional Exit? Y/N that pops up once in a while if the back button gets hit inadvertently and prevents that. Avarex is back to exiting on a double-tap, which brings back the danger of it just being gone when you need it.
9. I'll +1 from other comments that the obstacles in Avare are useful. Not having them removes useful information. Having them configurable (like a lot of things) means the people who find them useful can have them and the people who don't aren't burdened with them.
10. Generally configurability is good in an EFB, and it is in Avare, but it seems to be heavily deprecated in Avarex, which probably creates a barrier to utility for a lot of people like me.
Just thoughts so far on only being able to use it a little bit during a flight. I wish I could have tested it more, but I didn't find it usable in its current state.