I am doing it right now (for the first and probably last time), but I think it has helped me keep alot of size that I may have lost just due to what is my poor diet right now...I think it is effective for keeping gains but it will not allow full restoration of natural T levels therefore should be used sparingly (if at all).
i personally think if you are gonna bridge, you might as well just switch up the anabolics and stay on, but just for insight, i got a friend that is bridging with 10mg in the am and he appears to be doing ok on it, so it may not be useless