PROS: Great looking, very aerodynamic, provides excellent GPS signal reception for my handheld GPS, affordable. CONS: No mounting template provided (which is odd) so marking the hole locations on the fuselage was a bit of a challenge. I used the base to transfer the hole locations, but a paper template would have been appreciated to allow me to use a transfer punch instead. CONCLUSION: This is a significant improvement over having the antenna sitting up on my glareshield - I have never had a loss of signal in the two years I've been flying with it. It looks like a purpose-built aviation GPS antenna as well this doesn't really add any true value, but it does modernize the look of my older airframe.