Climb a lot with my best mate and while she has never dropped me with 50kg weight difference physics does set time take over! Weighting her down works ok ish but causes a risk of her hand being pulled into device (happend a couple of times) so the ohm was tried and removing weight from her onto the wall is a big plus. Don't quite trust the QuickDraw due to the range of moment of the device during activation so have changed for a small lock gate.
This is fantastic, it adds zero friction to the lead climber taking up to clip but in the event of a fall adds loads of friction reducing the strain on the belayer enormously. I weigh 14.5 stone and I have many belayers who weigh 10 or 11 stone this either negates the need for a bag or stops them being lifted of the ground to the first clip. I have only ever used it for indoor sports climbing but I will use for outdoor sports and if the first runner is suitable for trad.
Good service from RR, phoned Thurs to check availability (because everywhere else I tried was sold out) then placed the order. Paid a little extra for next day DPD delivery which arrived around lunchtime Friday. Used at Undercover Rock in Bristol on Friday evening. I am heavier than my climbing partners by approx 60% and they had previously had to modify their techniques massively. With this device there was no launching up the wall and lowering was considerably easier for them. It just works. I anticipated that loading the rope into the ohm would be a bit of hassle, but the spring loaded catch makes this dead easy too.