I have a friend that bought one. They're too busy to get its full potential.
One complaint they had was the frequency and cost of oil replacement in the vacuum pump.
I think that a "dry pump" would be needed regardless of extra cost.
Maybe they use a dry pump now exclusively, not sure. Fwiw.
People are building a little filter system to reclaim the oil.
Haven't looked into it to see the particulars tho.
I used one these from HoboFreight, 60ish bux.
It's a bit light, a little heavier cart is warranted.
It does ok with a piece of plywood cut to fit in the top shelf. Just drilled a hole through for the drain to go straight down.