Ive had both the NASA BM2 and now the Victron BMV712. I prefer the Victron, however the NASA has a good large display so is easy to read.
But the Victron has bluetooth to your phone so thats better I think.
Funny isnt it, for years & years the ash door was seperate to the fix door. Suddenly a few years ago it all changes.
Its as if they assume the general public to be completely thick. which I agree some are......