I have a Vacmaster Pro 350 that I am pretty happy with so far (bought in 2016), but haven't used it particularly heavily. I wanted a "heavy duty" non commercial unit (wasn't ready or able to jump in to the big chamber vacs). Their current model is the
Pro 360.
I was given an older Vacmaster VP112 chamber vac that needed some sealer bar parts and a couple other things. They were very helpful (dealer I was working with was vacuumsealersunlimited.com, and the importer/parts depot is ARYinc.com). This was in 2017. I never was able to get this thing to seal properly, as mentioned above by another owner. I had high hopes, but no confidence in the unit. I spent a couple hundred on parts, and back and forth a couple times to get the
right parts, which didn't end up fixing it.
If I was doing it again today, I am not 100% sure about Vacmaster, but I would want a very similar unit to my 350 feature wise. Vacuumsealersunlimited.com has been a very good vendor, but it looks like they are having availability issues like everyone else right now.
ETA:
Weston makes a unit comparable to the Vacmaster.