Bought mine 5/2012. Finally getting around to writing the review. I mounted mine where the optional Battery Gauge goes below the right side pocket. Took my time and used black silicon rubber to seal it around the outside and secure it behind the panel after I cut it out. Looks like it was made to be mounted there! So after mounting I screwed the sensors on the stock valve stems (bad idea)and took off. After a couple months, I lost the front sensor from vibration even with the clips on. Called Mfg and ordered a replacement sensor and was also informed you need to use the included steel stems for mounting sensors on the outside. Guess I missed that part as I found that all that vibration also cracked the rubber seal on the valve stem. I had just purchased the tires a couple months ago so another trip back to the shop to have them unmount, install included valve stems and sensors (inside this time) and remount. No problems after that. I've had the Doran and original sensors for 4 years now and 2 sets of tires since I installed it and it has worked flawless. Front sensor started going out a couple months ago. It would loose connection to the Doran at night and start working during the day. Probably due to temperature change as the battery is weak. I called the Mfg and ordered a new set of sensors. When I told the guy at Doran that I've had these sensors for 4 years he said WOW! Most guys were only getting about 18 months out of the sensors. He also told me that they redesigned them for that same reason and sensor life should be twice that. He also told me that the price went up after the redesign to $39.95/ea. I only paid $25 for the first sensor replacement back in 2012 after the bonehead mistake I made with the valve stems. So, $80 now for replacement sensors instead of $50. If I get another 4 years out of the new sensors I'll be just as happy. I'm getting maximum tire life since I bought the Doran as I keep my tires at a constant 40 and 41. Well worth the money in my opinion and I always know my tire pressure without having to lay down and check that rear tire pressure!