I just bought a NVB-445-SPCL 5233 (5-1/2" bbl .44 SPL) a few weeks ago and for my tastes, the factory grips are too thin. Their size and also not being wood makes them a bit uncomfortable in my hand than my other Blackhawks... but, I can always buy or whip up a pair that suit me better.
I was shooting "Cowboy" ammo (the only commercially loaded ammo available in my area), so recoil was much more mild than a .357 Magnum and not a problem. With a better set of grips it/you will be able to handle the more energetic stuff decently.
Nonetheless, I still think it is a definite winner... if I find myself with the need to sell off something in a financial emergency, this one will be among the last to go.