I have this one on my .54 renegade.
I have the closer together rear sight mounting holes on my renegade, as opposed to some of the first TC's that had much wider spacing, and the sight was supposed to be a match...it didn't have the correct spacing however. I'd say it was around a whole 1/8" off or so...factory flaw or common spacing for them I can't say. I simply slotted one of the holes so I could still use both screws and have had no issues with it moving ( I did blue Loctite them).
My sight also came with a 3/8" dovetail red front sight, and it didn't fit as well. It would just start into the dovetail groove on my barrel but then simply would not slide over so I could center it even with some very serious smacks from a brass punch and hammer. I ended up filing it down quite a little bit before I could get it to slide all the way to where it was centered (a triangular file is your friend here). That sucker still isn't going to move, I can tell you that.
I like the ghost ring peep, I can quickly acquire it and my eye automatically centers the front sight in it well. If I was going to change anything it would be the front sight. I would do a green FO instead of red, and also make it a much smaller diameter. I've shot FO sights in archery for years now and I'd guess that the front sight FO is around a .029" diameter? Someone else mentioned a .060" diameter but I don't think mine is quite that big. It covers quite a bit of target at 100 yards though, so if you like to try to shoot small groups on paper along with hunting with it you're going to be disappointed. I personally would much prefer a .010" front FO sight, it would be much better at distance as well as being easier to shoot paper. My experience using .010" sights on my bow is they still show up fine in low light, even in the timber. I find that I can't see enough detail of the side of the animal in low light long before the sight quits glowing. It is amazing how little light there needs to be in the sky for a FO to still glow.
A FO sight can "halo" pretty bad in bright sun too. I will cover some of the exposed FO rod with small pieces of black tape that I've cut when going shooting in bright sunlight. Not on the top where it would mess with your sight picture but on the sides.
Everyone's eyesight is a bit different, but my advice would be to go with the Williams rear ghost ring sight but look for a front sight with a green FO and NO MORE than a .019" diameter if possible.