For me it's a positive change. I bought one of the 50% off Joplin seatposts from CRC and it's great. My bike seems to have a slightly oversized ID on the seat tube so the post was always slipping unless I had the QR done up really tight. This meant I always used to keep my saddle a bit lower than I'd normally like for climbing as trying to open the clamp was a complete bastid. I'd end up pinching my finger tips or worse, breaking a nail.
I'd only ever drop the saddle if I was riding something real steep and technical. With the Joplin fitted I now lower and raise at will. No more stopping and wrestling with the clamp and no more broken nails, but most importantly I can have the saddle where I like when I like.
So what item, (good or bad) has done it for you?