my dealership had them on display (and smartly so), and being able to pick one up while holding an oem one in your other hand made the purchase decision an easy one. but in hopes of helping others here who might be contemplating its purchase, i'd recommend the "duration" version (higher cranking) ShoraiUsa - LFX18A1-BS12
versus the lesser cranking option which is actually the recommended option for the GS per the website. i initially ordered/received the latter and didn't think the cranking power was sufficient when turning over the motor, the higher cranking one works perfectly. the weight savings is about 7lbs (no, i thankfully don't need to physically lose weight
) which helps offset weight from a tank or tail bag. the battery comes with a foam shim kit that helps you build out the battery box to keep it perfectly in place. the install was easy and didn't take all that much time. no, i have no affiliation with the company.
ShoraiUsa - R1200GS (Adventure)
hope this helps,
edit: mods, i wasn't sure whether this belonged here in Maintenance/Mods or Accessories, please move it as you see fit.