I have a few technibond items from years ago... some have held up very well, others have tarnished and the tarnish can't be removed. Two things to know.... first of all the recipe for technibond has changed over the years. Secondly, and maybe more importantly, there are a number of different vendors who make the technibond items for hsn. The quality may differ among the different items because they are made by different companies.
In my experience, items with lots of prongs (which hold gemstones), do not hold up well. Earrings and necklaces seem to fare better than bracelets or rings, because the earrings and necklaces get less abuse. I found this to be true with any plated jewelry, whether technibond, vermeil, or other clad jewelry.
Enjoy your new bracelet. Wear it often while it's still under the return policy. After that, you have not recourse if there is a problem.