I bought the Full On MB6 recently so I can't speak to it's long term reliability but I find it is VERY well built, I would doubt that reliability is going to be an issue. As for ease of use, it is excellent with large button that is easy to use with gloves on while riding, it also doesn't have a bunch of needless settings to scroll through to get the light adjusted to the amount of light you want, it's fast and simple exactly what you need on the trails at night. The beam spread is HUGE and the brightness is excellent, one person I saw in the trails called it " blinding " and I turned it down when I was quite a distance from him. The cables and fittings have a really secure feeling and the cable guides they provide make it very tidy, no wires all over the place. The battery charges quickly and the remaining percentage of charge left is easy to see. Overall I would say it is a VERY well thought out system and really easy to use when you're off road, it may be a little more expensive than some other lights but it's worth it and I would highly recommend it.