these Beryl scooters and bikes

we are visiting the area for 3 days at end of Feb, and as per everyones advice it looks like all the things we want to do are spread out from Sandbank - Bournemouth - Boscombe - Southbourne... are these scooters easy to just pick up and drop off? are there usually loads available and in decent condition? we'll download the app before we arrive, they just seem ideal to get us about