Its a matter of intense personal preference. The inventor of the line arrow, Forrest, dives caves in a jacket BC. There are a number of us side mount divers who don't like a traditional back plate. I dive a Zeagle Express Tech for both back mounting singles and side mounting doubles. Its fun and works well!Why is it that a BP&W is better for tech diving than a jacket/vest style BC? I am new to scuba (getting my OW cert in January) but I have been reading a lot and find myself curious over the hole BP&W vs jacket/vest BC. Thanks for the info.