So, I have two '18 Trixx 3 ups. This season I put comfort seats and mirrors on both of them. I have to say the Sparks are a naturally bumpy ride, and I think after a time you'll start to experience a bit of discomfort with any seat. Having said that, the comfort seats do make a noticeable difference. I can probably ride about twice as long now before starting to feel it in my butt and back. Also, it's worth mentioning that I bought the seats and mirrors all at once from the dealer and got about 20% off. Saved about $180 on the whole package. Just saying.