Exactly what you want - 1 less hose
Look and Feel: Installed it myself on a Mares Prestige BCD. Too easy. It is compatible with other brand BCDs as well, comes with adapters for their inflator hoses. Also comes with its own 1st stage hose (larger) since the inflator will now require additional air volume due to reg. Has larger inflate/deflate buttons that standard inflators seem to have, which is a plus. As a whole, it is bigger than a standard inflator mechanism due to reg integration.
Actually breathes easier than my Mares Instinct. It works exactly like the standard inflator. The larger size doesn't bother me at all since it hangs out of the way. It actually makes it easier to grab in a hurry. This is way better than an extra reg.
You won't be disappointed.