Thanks for the nice comment SuperBee364!
I absolutely recommend it
Used it again on a RS4 and it acted beautifully. You may go well with a Makita (excellent machines) and it is the choice of many detailers, but its a bit on the heavy side and a bit too much for me and my back problems. I find the Flex to be very well built and very smooth with the electronic accelerating trigger, add to this its light weight and it fits me perfectly!
Although let me recommend you also that you get some 3M pads + 3M backing plate. They are the best thing I ever used!