well its been a few thousand miles since I've installed them both, and I have to say, it was money well spent, they both make my riding experience so much more comfortable .
I had the seat first and that helped my butt on the longer rides, but it added extra height and distance from the bars, which already were uncomfortable , but after adding the Heli Bars...wow what a difference .
I installed the seat myself, really easy . I was reluctant to try to install the bars myself, even with the confidence of some of your advice on here, so I paid a buddy $60 and he installed them, he said it wasn't hard just a little tedious . I did sit and watch him work to keep him company, and after watching him, I was glad I paid him LOL.
My same buddy is going to install my Torq Loopz for me, and I am going to ask him to do the air filter too LOL hopefully he will be as cheap as the bars.