I had to Google Beryl bikes. How long have they been around and how well do they work? They had to scrap the bike hire scheme in Newcastle due to people dumping them in the river & otherwise vandalising them. They've just started a trial of e-scooters so we'll see how that goes.
Currently they are available at
limited locations in the UK including Watford. They have been around just over a year in my area and have a few hundred bikes plus a smaller number of ebikes. They have quite simple infrastructure- they have docks, but these are simple stands with no moving parts- they are just locations where they should be left. It's possible to leave them anywhere but there's a £5 charge for leaving outside of the defined areas and £10 charge for leaving them outside of the zone of operation (you can ride outside the zone without charge). It seems to work well-enough. They can be temporarily paused for 15 minutes outside of docking areas without incurring a £5 charge- useful for shopping.
They can only be used through a phone app (this likely excludes some users). The most cost effective way to use them is to buy minutes (I think 100 minutes is a fiver) then they can be unlocked by placing your smartphone over a sensor on the stem. E-bikes have a standard extra £1 charge per journey.
I don't know if there has been attrition due to vandalism- I haven't heard about it and neither have seen any evidence of it. The main problem is the bikes really need a bipod stand rather than a kickstand on one side- they end up on the ground in windy weather.
Bikes are fine- three speed hub, hub brakes. They have a small front rack with a bungee cord attached- it'll take a bag of shopping.
Bikes left out of parking zones are collected and returned to the docks- Beryl have a e-bike trailer that takes two bikes and also vans to move bikes around.