Phil & Freda are great folks. My M-500 went down at a gig a few years ago, and it was caused by a shorted cable that the soundman inserted in the direct out jack.
Freda had me ship the amp to their repair facility, and I was back up & running in about 10 days.
Repairs were fairly inexpensive, but shipping to St. Louis & back was a bit expensive....
I have also found my ultimate sound with PJB gear, so I too, will be sticking with it.
EDIT: Thank God
I had my SWR Headlite with me - it saved the day for me.