I installed the ghost bracket myself and it was pretty easy -- maybe an hour or so. The hardest part was fitting my fat hand up under the fender on my heritage with the 150 rear tire. I use them with the detachable sideplates. You will find that the bags sit out a bit wider when installed, but no one has ever seemed to notice, other than me.
One VERY important fact on this -- if you are running the 150mm rear tire -- BEWARE. I found out the hard way that the new hardware stuck out too far under the fender and trashed a pretty good tire. SO, if you have a wide rear tire, you will need to remove the rear wheel and tire, install the brackets and then grind the studs off even with the nuts to ensure you don't rub.
You may be able to put the bolts through from the inside and use the nuts on the outside, but it may not look as nice. If you use an acorn nut on the outside, it may interfere with the ghost bracket -- not sure and I am 350 miles away from my bike right now....
If you are not running a 150 tire, the install should be easy and trouble free. Sorry, but I haven't tried the Bubba's brackets??