I don't know about SaddleBag Shapers...but I do know gotsaggybags.com work well.
here are some before / after pics. I've posted these pics several times because the topic appears regularly.
Anyway, gotsaggybags cost me approx. 100$ Cdn. The 'install' was not v. difficult or time consuming. You will notice that the bags look darker and glossier..because I also cleaned them ...they look like new bags.
Worked for me...I recomment it....here are the pics