9 bar is really easy achievable with Flair. 9 bar is close to 18 kg tamping force So if you want, the medium tamp force should be applied to the lever of Flair. This can be achieved with 1 hand slowly pressing down so you have a constant flow (no dripping).
With really light roasts and a uniform grinder I can pull decent shots, but nowhere near my 58 mm espresso machine. The flair 40 mm diameter basket and the small perforated area surface makes you grind coarser than normal. This means you are not getting a full range of flavors in the cup.
If you want to do an OK espresso w/o making it a big complex process than yes, Flair is good. If you want to squeeze everything out of a coffee to take it to the limit, then no. The machine needs another basket and I would suggest picking a 58 mm group/basket.
Right now my espresso machine is in a rebuilding stage (implementing a lot of electronics and sensors, so I am left with either v60 or Flair). The coffee I have now is way too good to be wasted on Flair, so I am using rarely V60. The coffee is roasted by Gringo Roasters Norway.