I agree that all Jon's products are a plus.
They are certainly a much better solution to installing relays all over the place to take voltage loads off of the switches.
I would put it this way, if you intend to keep your Pantera and drive it, P-E products are not the only solution to increasing reliability but a really good one to replacing increasingly delicate, sometimes fragile and marginally adequate original electronics.
Plus if you buy them, you get to call him personally and break his chops! That alone should not be underestimated in value!