I,ve never had any problems with XV's customer service. Always got an answer on whatever I have been wondering about. I have even returned defect dampers, living in europe, no costs to me. I have their Level II setup.
Don't make this another RMS vs XV thread. The have different products at different prices. Read up on them, decide what meets your needs or budget. I live close to one of Norways best roadrace track, so I choose XV despite the price, I saved money for years for it. Will test it out on the track next summer