I've gone to my local theatre and have seen season 4 through episode 6. Overall, I think the show continues to be excellent in most respects. I thought it went on too long with Thomas' grieving over the loss of his love.
Oddly enough, for both showings I was the only one in the theatre. Very strange experience. I don't think they advertised it very well, I came across season 4 by accident while on google.