BMS at first ignored or forgot about my request for help over a KU93 controller which didn't work properly, however, when I asked again they sent another one with my next order. The order (as with all my orders with them) they sought an extra $15 or $25 postage for after a few days, even though it had no batteries or heavy stuff in it or anything (and before I mentioned they'd ignored/forgotten about the KU93). So both very good and very bad there.
I'd also point out that their 11.6ah 48v 09-type and 36v 14.5ah battery works out the same after shipping and duty as buying it from Eclipse in the UK except from Eclipse you get a warranty, whopping protection if you pay by credit card, and presumably support, whereas from BMS you get only 180 days paypal protection for 'goods not as described' which includes the formal requirement that you send it back to China at your cost.
I'd also point out that their 11.6ah 48v 09-type and 36v 14.5ah battery works out the same after shipping and duty as buying it from Eclipse in the UK except from Eclipse you get a warranty, whopping protection if you pay by credit card, and presumably support, whereas from BMS you get only 180 days paypal protection for 'goods not as described' which includes the formal requirement that you send it back to China at your cost.