So to drive my point, HAG's design does not seem to allow it to work with 20" wheels and maybe even 24" could be a problem. In addition the tool moves so close to the wheels that it is likely to interfere with some rear racks. You may say that you do not deal with bikes that have such characteristics. Well, this type of tool is a long term investment, as you use it only once in a while, and by the 10th use you may find out that it does not work with the bike you need to fix.
I use it minimum 5-6 times a day, every day. No, it doesn't work w/ small wheel bikes or racks but it works so well w/ every 'normal' bike that it still gets used a TON.