I test rode an SR last year. Unfortunately, I discovered the price to insure an SR over an S was almost twice the price. That, plus the premium over the price of the standard S made me decide to stick with the S.
Currently I commute with a BMW C650GT (a Maxi Scooter) but since we just had solar panels installed last year and our electric rate is locked in for the next two decades, I decided to go electric. The S 13kWh has a highway range (at a steady 70 mph) of 81 miles. That's more than enough for my 34 mile round trip commute plus a lunch time ride. I figure it'll save the wear and tear on the two ICE bikes (the aforementioned scooter and my K1200LT with nearly 200,000 miles on the odometer).
The range at 70mph is important; I don't care WHAT the posted speed limit is, if you're not doing at least 70mph you're going to get run off the road. Even at 70 I routinely get passed on my morning commute (and the speed limit on the LIE is 55 mph).
The scooter (like a lot of the newer BMWs) hasn't been the most reliable bike I've ever owned but the K1200LT is. I can use the S for short hops (where the ICE bikes won't get properly warmed up), the scooter for longer runs in traffic and the K1200LT for everything else. That's the plan, anyway.