I love vex via. It has been super helpful to our team before and during competitions. Overall, it is a GREAT app. Yes, I see what some of the negative reviews are saying, but since you won't be using VEXvia every day, there are a few bugs that occur OCCASIONALLY but don't really stop you from doing what is most important.
There are two things I would recommend to improve VEXvia.
1. A "team search". The way VEXvia is set up now, it is hard to find a specific team and there matches as fast as you may want. It would be easier to have a search bar where all you need to do is type in the team number and the team and their matches, scores, etc. will show up.
2. I wish vex via wold advertise a bit better. Like, at a lot of competitions I have talked to people about vex via, and they've never heard of it.
Other than that, I LOVE VEXvia. It is amazing and does everything it says it does. You should defiantly get VEXvia.