My first Zex NMU went bad on me. I called Zex, and they hooked me up. The local speed shop (speedpeople.com) gave me a new NMU the same day and sent the other back for me. I haven't had any troubles at all with the new NMU so nothing to worry about there. The dry kit has been good to me, though I'd like to upgrade to the wet kit soon. :thumbup: to everyone at Zex for really good customer service. I've also been running the remote bottle opener and a purge valve from them with no problems all season.