I have an avast with the cell phone mount and a BAO for dslr.
I mostly like it. Holds a phone snug, allows me.to rotate and slide the phone to center the camera.
I use it often but for phone pics I think It would have been easier to get a big top down viewer.
I get a lot of LED reflection back up into the phone camera. They provide a rubber boot but it can be challenging to fit it over a phone.
All glare/reflection becomes moot is you have a big lens taking up most of the free space in the tube. Being able to just rest the phone directly on a viewer would do the same.
The filter Avast sends is ok, standard orange gel one that you drop into the tube. I use a clip on brown but it's on my list to get a brown gel I can drop in.
Sent from my Pixel 3a XL using Tapatalk