Yes, they are VERY sensitive. I dropped my Germasian Tourbillon ones, and it instantly died on me... Mine has a PST 3320 movement.
The seller said I could send it in for service, prepared the watch for shipment and asked a confirmation of the address. Haven't gotten a reply yet, maybe he is on vacation.
Hope to get it repaired. I presume repair means the movement will need to be replaced, as servicing is virtually impossible.
If there is anyone on the forum who can service it, and the seller is unable to get it fixed, I will sure try...
I got it on eBay for 150 euro, NEW in box, but I would love to get it working again. It was a very nice watch.