My two had islabikes cnoc 16’s which have been perfect an I can’t fault but they weren’t cheap. However if looked after they lose very little money at resale so the cost of ownership has only been £50 or so for two years. They have been faultless and really well made.
I can’t afford the larger islabikes as upgrades though unfortunately so going for the frog bikes. Very well made but I suspect without the same resale value.