The machine works great on large areas that are relatively flat. The hummel is a more effective machine on floors that are very lumpy or uneven. So basically, the Bona Belt 10 is suited for what you're looking to do I think. I've seen some of the 12 inch machines but they are all expensive and paper is hard to find.
it is a 220v machine that connects pretty much the same way as a hummel.The plug that is on the machine is a 30 amp connector though where the hummel imported into the USa is a 20 amp connector plug. The 30 amp is slightly larger than the 20 so that the two cannot be used together or confused.
I was buying most of my belts online from floor mechanics dot com
www.floormechanics.com I mostly bought the Bona brand but also tried 3M and Virginia.
As far as how I like the machine, it is over all good. I prefer the Hummel for most homes that I work in because most of the homes I work in consist of small to medium rooms but for gyms, I prefer the Bona as it gets more work done .As far as reliability, I have had no issues with the Bona machine.its top roller is metal and will last years where the hummel has a rubber top roller that needs replacing about 1 time per year.
Here's a link to what the machine costs new at Floor Mechanics. About $5700.00
http://www.floormechanics.com/floor_mac ... %29130.php I'm willing to let my machine go for $3000.00 .So whoever decides to buy it needs to pick up freight charges on their end.IF you decide you want to buy it, I can exchange my ebay user name with you so that you can see my good rep in selling and maybe I could make a video of the machine that shows it working and how to operate it .