I have played mixed 7.0 during the summer and now in a USTA league. I think it is a lot of fun, although we tend to get a lot of 4.0 male 3.0 female opponents. That can be a little tough at times. We have lots of pretty even matches, but maybe that is common in 7.
NTRP 3.5 with < 130mph TTW serve | Head Microgel Radical MP (3g split at 3&9, 5g in handle) | Babolat Xcel French Open 16ga @ 58 | Year 2 of playing