The I900 works great. The only catch to the RFID sensor is that it only looks for the fob when you turn on the ignition. If you use the perimiter sensor, or you like to get on the bike before you start it, you will set off the alarm. If you turn the ignition on, then back off the alarm will re-arm in 30 seconds. You can manually disarm the alarm to avoid the noise, but you will need to arm the alarm manually to get the RFID function working again. It's a pain to get used to, but it works great if you're willing to adapt to the technology (because it's not going to adapt to you).