All those parts they're installing great but you can likely have a local builder build you the same or better transmission using your unit for a good deal less. Plus he'd be local to you so if it needs to go back to him under warranty, you dont have to worry about shipping.
Re that 700r4 in the link, I'd swap their sun gear reaction shell with a Sonnax smart shell as it's fully rollerized when paired with a 07+ induction hardend reaction shaft from a 4L70e. I also dont see Transgo unbreakable pump rings, late model 4L60E bonded steel/rubber forward drum pistons and ret spring, Sonnax fwd drum reinforcement sleeve kit, tubular steels in the low reverse and reverse input drum, wide Alto 2-4 band. I also sometimes rollerize the pump-rev input thrust surface using a th350 pump bearing and 200-4R direct clutch bushing in place of the factory bushing to locate the bearing (this mod has you omit the plastic thrust washer on the back of the pump). Doesnt mean they cant do those as well but likely means price goes up from there.
Just a few initial thoughts...
