I followed the link to Wiggy's site and read this:

"Wiggy's Guarantee is for a lifetime of use. If a seam opens, the zipper breaks or the Lamilite insulation deteriorates (such as losing its loft or separating, clumping in one place or another), Wiggy's will repair or replace your bag at no charge to you.
At this time, I know of no sleeping bag manufacturer that would even consider such a guarantee. The reason is simple: they already know the insulation they use will deteriorate. If you have ever compared information from the different sleeping bag and extreme cold weather garment manufactures, you will see that they have never guaranteed the insulation used-nor do they now. "

I had a North Face "Cat's Meow" synthetic bag that lost some loft over a few years' hard use. I submitted it to North Face and they gave me a new bag within a couple weeks.

I've not used Wiggy's gear (never seen it in a retail store) but he sure talks big.