At 90mm equivalent, it also doubles as a half-decent portrait lens on DX bodies. The images it produces are as sharp as you could ever want, and it is just perfect for subjects that don't move much such as flowers or bees that are occupied with them.
At full 1:1 the working distance is miniscule - depending on what you're photographing you might find you don't have the room to use the SB-R1C1 kit and have to put the SB-R200s on their stands. It might occasionally be handy to have VR, but you can't have everything: other than that, no disadvantages, five stars.
(Written by: giraffoto)