I usually stay out of BP/ BC debates but for some reason I feel like typing. A good search will turn up a great deal of info but mostly it's BP users spouting the same logic. Most of what they say is true however there is a "yes but" that few ever attach so let me do so. Oh and yes I tried a BP and did not care for it, went back to my old BC.
Modular, this allows selecting a plate and wing appropriate to the application, and allows making changes when and if your application changes. Single tanks? Yes Doubles? yes again. Doubles and stages? sure no problem.
True but what you will find if you talk with BP users, they often own mulitple BP/wings set up for the vaious configs rather than changing between configs. The defeats the "buy only one' comment often made. At the price of wings, you can easily buy an inexpensive travel BC and a BP for doubles.
Allows easy replacement of any of the components.
Again, true but just how often do you actally replace a worn out BC? In addition there are BCs that allow you to change out components. Zeagle for one.
Moves 5-6 lbs up off your weight belt and onto your back. This often helps the diver get horizontally trimmed.
Or 3 lbs with an AL BP, many (most ?) BCs have trim pockets that allow the same thing....and your not stuck with one amount. Diving warm wet a SS BP will over weight me..actually an AL will also.
The back plate provides a stable platform / interface between the diver and cylinder.
This one I will agree with but for single tanks it not really that much of a big deal.
The harness is essentially infinitely adjustable.
So what? Most modern BCs have a fairly wide adjustment range. Unless I am loaning it to both kids and football players, why does it need to be "infinitely adjustable"? It's my BC, I dive it and rarely loan it out. When I do, I can adjust my BC very quickly, BPs take some effort to adjust and must be removed to do so. BPs are infinitely adjustable and also a real pain if you do.
No "hug" when inflated.
This assumes you are diving a jacket style BC, all back inflates (of which BPs are a subset) do not hug when inflated.
Often far less expensive than many "full featured" bc's
If you compair a BP to the "tech" bcs then this a fair statement, however many of us don't use or want one of the "tech" BCs...frankly if I was doing tech I would want a BP. If however, you compair features to features the the BP is on par and often more expensive than many BC's, esp if you use a SS back plate. Do a quick scan of Scubatoys and add up to cost. Be sure to include the cost of tank bands and pockets and weight belts and a STA if needed. Compair Halcyon equipment and the BP does not come close.
Crotch Strap allows the BP&W to remain stable, and not ride up at the surface.
And a crotch strap does the same thing on any BC....which is why my BC has one.
I don't dislike BPs, they are great pieces of equipment and if diving doubles they are by far the better choice. For single tank diving they will also so a fine job but a quality back inflate BC will do the job just as well plus add some creature comforts that many of us like. Quick easy adjustments, intergrated weights and a pocket or 2 for are really nice features I like on a BC...none of which a BP offer.
