I won't knock there products, if you need the best, or are doing serious night time MTB downhill as a professional, ect then they are fanatasic, well built with a spec to match, but can be heavy with larger battery's.
As said FANTASTIC Product, but only if you can find the £££ to match, they are very expensive IMO, I'd even go so far as to say overpriced!
If I had the money and nothing better to spend it on I'd certainly pick lupine, but unless you need that kind of system I think it can be a waste of money, even there cheaper systems like pikko is expensive, bit then you have compition St this spec range, so I'd properly buy something else...
But as said amazing products.