It seems the degree of satisfaction with different suppliers varies greatly. I have used Howell panels in the past and have been very happy with them. In restoring the doors on my '32 pickup Howell was the only one I could find that offered lower door skins that went clear up to the reveal. My doors had been previously patched with short 6" patches and was done rather shoddily. These tall panels saved the day and the doors.
I have heard varying stories on products and service from Howell but I could find no fault with them.