I reviewed the first episode and thought I was generous offering a 6. I was actually. The good news is that not all things start out lovable. Some things you grow to love.
In that review I said I was only committing to 3 episodes. Now I'm in, period. The second episode had me binging on the 3rd. The only reason I didn't watch a 4th is it was well past "bed time".
If you've read the blurbs and promo info on this series, you know that the episodes are named after a quote in that episode. It was the scene with the "Skinny Bitch" that sealed the deal with me.
Why 7 and not 8-9-10? Frankly it is only that it is still early in the series and hasn't yet really bloomed. I fully expect this series to level out in the 9.x range.
Again, it is never a mistake to trust a project where J. Michael Straczynski in involved. I've studied writing for decades. Some, like Chris Carter (X-files) or Geroge R.R. Martin (Song of Ice & Fire --> Game of Thrones) seem to go brain dead or simply stop writing upon significant financial success. Others, like JMS and Dean Koontz never stop and never compromise on the high standards they set for themselves.
Don't misunderstand (Carter/Martin) a TV series can be successful without it's founders or creators (Star Trek series, etc.) but when you get a real talented and experienced pro who will deliver even when his budget has been mangled, (JMS) it's worth a watch.