Murray, I have the manual, under-seat actuated type - Tranz X Jump Seat. I added it to my gravel bike and It works as described. it is a weight gain for sure. But I have short legs 30in. for my 5'9" height, but long arms so needed a 55cm frame. That is for context. My goal was to have a lower seat for the tricky steep decent on trails I ended up on. Even though I only use about 1 inch of drop, it is worth it to me. Also, I use the bike as a road bike too so I just swap out to a carbon post and different seat. Additionally, I use both a cabled and wireless AXS dropper on mt bikes, and I am a huge fan of them! It should help you for dismounting, as long as you gain enough drop. the stack height is a bit more than other droppers. Depends on your frame size. But seems you will really only be using it for dismounting, so not that much of an issue.