My experience with Levinson was dark, dank and smelly. New $8k DAC, orphaned, promised upgrades never materialized, $5k amp, defective on off switch and premature cap death, found out it was my problem (even though they knew about the issues) $5k pre-amp, unserviceable for the costs involved, after a 5 year life.
Their ex-head tech, before Harmon took over said I should buy a nice new shotgun for my other hobby before spendig money on any new ML or repair costs. He knew what was coming, evidently.
I've been in high end about 30 years now and have never, ever had a company, OF ANY SORT, treat repairs or customer service so arrogantly and the repair costs are just nothing short of unconscionable, IF anybody gives enough of a damn to even try. I've heard horror stories about repair ATTEMPTS that cost a fortune and were a total waste.
I don't know about the repair places mentioned, but I've heard about the costs and quite spotty repairs. I'm sure that's not all true, but I voted with my pocketbook, cut my loses, and sold it for the disappointment that it had become.