Personally I would get a set of Motosliders, either from Nate at
Motosliders or from Blair at
SV Racing Parts. Motosliders are more effective and cheaper too.
The shape of the bung and the strength of the bolt are the two main weakness' to the R&G design. When you over come these two issues, a few more come to light which is why I do not recommend them especially as an engineer at R&G will agree that it is a flawed design. However, they do perform a little better than any of the cheap bungs which bolt to either the front or rear cylinder mount
A crash bung will not stop all damage, but in 90% of accidents I would say a decent crash bung would keep the repair costs down and possibly save a write off.