A beadrider is a great option for hot days. Heck, I use mine all the time unless it it cold out. Nothing like having a breeze on the behind.
Some say the beadrider is uncomfortable. If your seat doesn't fit you the beadrider probably amplifies the problem. If you like your seat you'll probably love the beadrider.
If not perfect, it gives you two options. The beadrider doesn't need to be strapped on so you can quickly toss it in the bags when chilly or toss it back on the seat when ready for breeze on the behind.
I used an Ultimate seat for a year, then another year with the beadrider, the the last 2 years stock with beadrider.
I can't see not having a beadrider in the future.