Just came in to share my experience with Betarigs.
A few weeks ago I heard about the idea by visiting the leaserig.net website, but that was just way too user unfriendly. After that, I got no response from the admin when I asked for some help regarding the issues. Betarigs seemed a lot easier.
I have rented my first rig for 24 hours and the system works perfectly! Minutes after reservation, my rig got payed for and the software swithced to mining for the guy/gal who leased my rig. The payment just arrived and this shows up on the site aswell.
I will certainly lease more rigs on this website if the price is right!