Mine is still at a 100% success rate. I did have one failure that was a direct result of user error...I tried to pack it into too small of a rocket which caused only a partial deployment. Chute Release functioned flawlessly, however, and the rocket was tumble-recovered with only minor damage.
I do feel guilty that I convinced a friend to purchase one at GRITS. I did not observe the prep, but he attached the CR to the cone while the chute was attached to the shock cord at 1/3 length. The result wasn't pretty. The cone took the CR with it at ejection but the chute couldn't follow... deployment at apogee and the rocket drifted into a grove. Both were lost on their maiden flight.
Make certain that the CR and your chute are attached to the same anchor point!
I will vouch for Mr. Beans' outstanding service, however. I was having a problem with my Altimeter3 and he repaired it and had it back to me in no time. Outstanding customer support!
Cheers,
Michael