Nearly two years ago I purchased the STI. I thought it was the finest, most sensitive RD I had ever purchased until I bought the STI-R.
I have to say that the STI-R is alot better than just my STI. Partially because I live in a place (Canada) that outlaws RDs so my STI was always low on my dash and not optimally setup... but also because STI-R just seems to have a better receiver on it.
Anyone else care to confirm this?
I even get laser alerts from LEOs shooting laser at traffic on the other side of the road (180 degrees in the opposite direction from me), and the reflection bounces off the LEO's targets back to them (and to my STI-R) which alerts me.
That never happened with my regular STI.