Had my 7+ MB for 10 days now. It looks great but coming from a 6S, the Plus upgrade made me realize I wasn't comfortable with this size, one handed, when walking in the street.
Then I went to an AS, holded the JB and réaliser it was very grippy ! Since then I am looking for one available (none so far, I am in France and no JB available in the entire Europe so far...)
Since I am nearly at the end of my 14 days, I will have to give it back for a refund. In the meanwhile, I may get a 7 in Silver and hope I will get my JB+ Before the next 14 days so I can return it...!
Apart from the size with the slippery issue, it looks great and classy in matte black. Used to have the silver since the 5 and wanted to change back to black (never been interested by rose and gold)
Made my choice before seeing both black in real though... otherwise, I would have gotten the JB from start I guess.