I have a new BL36.
I'm personallty quite happy with it but I also knew very well what to expect with the kit from reading here so my expectations were low. I understood that there was a very good chance of broken spokes, bent rim, maybe a bad charger. I was ok with that as I planned to replace the rim and relace anyway down the track. I got a very good price on a new but technically used kit ($180, it was open box, seen to be damaged slightly) so for me those risks were worth it. When it arrived it did have the slightly bent rim, dings in the rim edge and a flat spot (how it came from the factory and hence my good price). One spoke was stripped and some others bent. I replaced the spoke, trued the wheel and everything has been fine.
Now, had I purchased the kit brand new at full price expecting to unwrap, bolt on and ride i would have been disappointed and probably quite angry. I wouldn't have been happy with it as it arrived so I can see where some people's disappointment comes in, and justified too I think. Better packing might help the issue, or stronger rims and properly tensioned spokes may prevent some of the damage. But this is something that should come from the factory i think, it really does seem that they have a problem but yet they have done nothing to fix it.
Otherwise the kits itself has been quite good I think. The motor is strong, my controller is working fine and I've had no other issues. But I haven't done huge miles on it yet but I think it should be quite long lasting so we'll see what happens.