I have them on all four of my Better-Bottles. If you are interested in never starting a siphon again and using the valves, ported closures and accessories that fit the ported closure (drytap airlock, 90˚ barb fitting, etc) to facilitate oxygen free transfer from primary to secondary using the CO2 produced during fermentation to purge the secondary carboy, then getting them ported is worth the extra money. IMHO.
I recognize that the cost of the accessories is high and that fact turns many people away, but I can't escape the fact that since I began using Better-Bottles I just simply enjoy the whole brewing process even more. Quite frankly because using them makes the process of fermenting, transferring, handling, cleaning and storing a whole lot easier and safer. As you can tell, I'm an advocate.
Purged Closed-Loop Racking (Fermentation CO2)