For my case only third party car damage, GetGo car, no damages.1 month. But if third party involved might be longer. I cannot recommend how they work for 3rd party damage. For own veh damage, I would say Getgo wont charge too much, but still higher than if you repaired yourself. Just prepare full excess first then nothing to worry.
Also rmb to monitor when the car you damaged returned to the slot and record with them via Livechat to avoid being charged unreasonable downtime loss.