One more pro: magazine capacity. Shouldn’t need it, but it is there.
The cons: expense and time. There are two tax stamps involved, so you’re not taking this home from your local gun store. There is some waiting involved.
Each of the components in this cost quite a bit. I got a screaming deal on the firearm, A Daniel Defense, but then got the red dot, a Leupold, closed emitter, which retailed for $950 (I paid a bit over $500 with the discount) and the suppressor, a Q titanium, was well over $1,000 with taxes and stamp. If you were to add everything up at retail, well, I’ve paid less for a used car at some points in my life.
Not cheap.
In the middle - it’s a long gun, but the SBR/suppressor overall length is about the same as a 16” barrel carbine and about the length of an HD shotgun. The light weight of the titanium suppressor and short overall length make it rather handy for use indoors, but it still requires some room to maneuver.