i have and use a 220 every day - had it for the past 8 years and i have to say - its been excellent in terms of durability and has not let me down once -
i dont want to jinx myself now -
its quick - peppy little chair - the anti-tippers work great - i am always with my front wheels off the ground - and they work to keep from tipping over - never had a problem with them either -- i agree with the battery back - it does stick out a bit - overall - its a compact chair -
i keep a nap sack on the back which helps to give it a better look - dosnt look like its sticking out as much - but compared to other chairs - yeah it does -
thats about the only thing i dont like is to change the batteries you have to take it apart - its not that hard - but many Vendor techs - never done it before -
you have them couch them first time - once they do it - then its easy for the next time -
i cant complain about this chair - i am soon to be getting my new chair in a few days - and stayed with quickie - this one is the 222 Se - i hope it serves me as good as my 220 does now -