I installed the Altrider skid plate and the crash bars on my 2015 ST. They should design an easily removable plate over the oil filter area to facilitate easy oil filter changes. Otherwise they are great. Crash bars are great protection if just lay the bike over as I have done. Do not make the mistake of parking downhill with the bike in neutral as the bike may move forward off the stand.
I'm going with the AltRider skid plate and the AltRider crash bars. The stainless steel headlight guards and the stainless grip handle to help assist putting it on the center stand. I'm still contemplating Panniers.