Assume you mean the bottom-only roller for a double system? I have the same one (ISCG05 mount variant).
There is a problem getting it left-right aligned with the chainrings. I have a threaded BB so put two spacers in to shift the right-hand crank/chainrings further out to the right. Even then, it’s not great:
1. It’s probably not good for the BB as I suspect there is now a gap in the tunnel between the BB cups.
2. It’s upset the chain-line to the cassette, so shifting and front-derailleur rub is slightly compromised.
3. in small-front/big-back, if I back pedal slightly, the chain moves up onto the inside ridge of the roller and then off the inside of the chainring.
Lifting the roller might help but the chain then runs millimetres from the bottom of the chainstay and will damage it. This is with a clutch mech so it’s not due to lack of chain tension, it’s just that there isn’t room in the frame design to get good alignment. If the BB shell was a bit narrower and the chainstay a bit higher it might work better.
I’ll persist a couple of more rides but I can see myself removing it.