another idea.
when the renter is evaluating/rating a rig, he could also indicate his rating in relation to the rent before that.
that would allow some kind of "this rig/service/... is better than this" and would allow to differentiate better between rigs with the same performance/price.
also rating could be in categories:
stability
performance (vs. promised performance)
service / contact /communication...
Makes more haze than it does good in my eyes - you can just write that in the review...
other than that would be cool to have a "rig bundeling" option for more rigs to be rented together. i know i can just set 1 pool on 2 miners but thats not what i want

Otherwise still working great for me