I have a 2008 efi (the mk1 as my local Enfield dealer called it when I described it to him) and a Himmy and I tried the Meteor out a couple of weeks ago for about an hour. I like a lot about it, smooth, looks very well made, nice proportions for a 350, even for me at 6ft it wasn't cramped, brakes worked well, some nice touches (starter switch, nav thingy, rear light) and bargain price. But, and it's a biggie, even for an Enfield rider not expecting a rocket ship, it was just too slow for me. The example I tried only had 280 miles on the clock so would loosen up a bit but a realistic indicated 65mph top speed and not much happening over 55mph just made it feel too pedestrian, even for the back lane bimbler I would want it for, add a pillion and I would be going backwards.
I would say it feels about as down on power on the Himmy as the Himmy does on the efi. It pulled well from low revs and didn't feel underpowered until you tired to get 'that bit more out of it, almost like a restricted 125 but with more oomph on the mid range.
I did like the heel and tow gearchange once I got used to it and it was genuinely nice on the backlanes but when I got back to the dealer I spotted a 2017 one owner low miles chrome classic they had in and bought that instead!
If Enfield do a 500 or Hitchcocks get another 6 - 8 hp out of the 350 (not impossible with a cam, air filter and less restrictive exhaust) then I do see a Meteor in my future but not as it comes.