I have to give a plus one to Corbin. I have not put one on my Heritage yet, but I plan to next year. I did put them on my sport bikes back when I rode those, and it was a night and day difference. They make a killer product, and they stand behind them from my experience.
The other nice thing is they have different styles of backrests that fit both the front and pillion seats. So you can pick one that looks right, and is wide enough to give you the support you need.
Good luck finding one that works for you.