Had mine 2 days - bit weird at first but getting used to it quickly.
Found it great on windows over connies, garages etc as it keeps brush flat on glass no matter what angle your working.
Also good in a tight space.
Makes the job a little quicker which over a week adds up.
The flipfast angle adaptor is great - adjusts the brush in seconds and easy to put back to your normal position.
Can you get buy without it ?? - yes but for what it costs defo a good buy as it will save you time and helps do a more thorough job on the tricky stuff.