I have had nothing but good results from SONA CS.
Own a pair of Swarovski 8x20B CL Pocket binos, bought second hand, and lost one of the rubber eye cups. Call Swaro CS and they said they would send me one or I could send them in for a checkout, no charge. Said their turnaround was 4-6 weeks that time of year coming in to hunting season. So, I sent them in. These had some scratches on the bridge and I put a note in asking if they still had the nice carry cases available to buy. The binos were back at my door in 8 business days looking like new including replacing the scratched parts; free 2 day return shipping. And; they included a brand new case at no charge.
That's Great service!