Hey Terry
I think you'll really like them once they are mounted up. I spoke with S&S development team after my install and gave them some feedback on install issues (about a year ago) so hopefully they took my pointers to heart. Here are the "challenges" I ran into with install:
1. You have to "spread" the header to mount it. Helps to have a second person for this step, with each one pulling the header apart. I got mine on by myself but it was difficult. Maybe they've improved the distance between the two head pipes so less spread is required.
2. Had to remove the brake lever for install. I couldn't get the angle right to lay the header in without removing the rear brake pedal/lever. Not a HUGE deal, but this is the first header (out of 10 or so) I've installed that required it. Be prepared.
3. I had to lengthen the cuts on the expansion joint for the cross-over pipe. Couldn't get it far enough on the header to allow it to bolt to the frame bracket.
4. I purchased some (just) silghtly longer bolts for the cross-over-pipe-to-frame-bracket mount - made it easier to install. I couldn't get the cross-over pipe close enough to the bracket to start the screws, some slightly longer bolts allowed me to use the bolts to fully seat the cross-over pipe to the header pipe (see item 3).
As I said, I provided all of this feedback to S&S immediately after my install and they were very receptive and appreciative. Have no idea if they've improved things or not. I'd be really interested if you could post-up on how your install goes. Even with the challenges noted above I'm really happy I went with this header. Hope you are to.
Good luck and hope this helps.