Where are these reviews? Always bear in mind that web reviews are usually skewed to the negative (happy cosumers tend to stay quiet, whilst grumpy ones are more vocal)
When you say "bleed kit" what you're refering to is a large volume hypodermic, a short length of hose and, perhaps, a nozzle to attach it to the brake. It might also come with a small bottle of fluid but you don't have to use hayes fluid. They are really very simple kits made of rather flimsy stuff. Bike shops never buy more than one kit (for the nozzle) because, after that, breakages can be covered by buying fifty cents worth of plastic tube from the hardware or a two dollar syringe from surgical supplies.
Bleeds should only be necessary if there is an ingress of air, water or dirt into the fluid which causes a degradation of performance. If your brakes are working fine then there is no reason to bleed them. Therefore, most consumers shouldn't need to do this regularly at all. I sold my last MTB to a mate five years ago. Since new it has had no more than new pads.