I see a lot of folks who build electric bicycles liking the brushless motors that, although more efficient, require a much more complicated control system. That control system is intended to try to get them to operated like a brushed motor, smooth with torque at start-up. Brushed motors are generally 10 - 20% less efficient, but controlling them is relatively simple. Brushed motor brushes wear out, but that usually takes a long time. I think that adding too much complexity to bicycles detracts from their elegance. I don't like the idea of expensive bikes, either. So, if you happen to prefer the old technology of brushed motors, you're not alone!