I have an older snapper 21 commercial. It's the Hi-Vac model with the 5hp Wisconsin Robin engine. I have to agree with another comment, that it is a very versatile mower. I only have a few residential accounts, and it's my primary mower for everything. I use a high lift blade for bagging and it doesn't leave anyything behind, and the ninja blade for mulching. For "billygoat" jobs, the side discharge chews through everything. I hear alot of complaints about the drive system, but I really like it because anything that fails is very easy to replace, cheap, and is VISIBLE. I inspect it almost every morning, and haven't had anything fail.
Even with the hi-vac model, the ninja blade mulches very well. If the blade is dull, a second pass may be required for wet stuff, but with sharp blades, this mower is a "jack of all trades".
The lever that controls the self propel take a little getting used to, but I don't have any problems with it whatsoever.
I typically carry a 1/2 and 9/16 ratchet and the various parts, and can tackle any job that I come across with this single machine.
Thus far, I'm extremely pleased with the Snapper.
Dodge Ram 1500
Snapper 21" Hi-Vac
Lawn Boy Smoke and Choke
Stihl FS 100RX Trimmer
Stihl KM 90 with attachments
Stihl BG 55 Blower
Stihl FS 45 Hedge Trimmers
Beautiful supportive wife
Lots of Motivation