I was hesitating also about buying an R or an S.
I actually went to my local store, just to check them out. I also asked if I could have them in my hand. I have rather small hands and an old EX1 fits me better then my Spectrum DX3.0, which I sold because I was using the old EX1 all the time (with a Spektrum-module).
I would go for the R because of
* the extra DSM2-technology. I might not feel the difference, but it wont hurt neither, will it
* the 30 programs ( Offcourse I don't own 30 cars, but It's easy when I can program 4 programs for one car: 1 for me, regular driving, 2e for me when driving in slippery situations, 3e for my 6-year old son, 4e for my 3 year old son ...
* I run on- and off-road Electric 1/10 cars ... so don't really need the extra telemetry.
* it's still backwards compatible with my three older Spektrum DSM1-receivers
BUT, I tested it myself ... the S fits my hand better. It's easier for me to get a good touch on the throthle-trigger. Braking is easier for this reason ...
The S is smaller, but provided with two extra pads to withen the grip ... which I won't need
and its is indeed more expensive!
and you do not get a free second receiver with the R as with the S.
... so I still can't decide