I got a new mountain bicycle on the weekend.
It's a Rocky Mountain Fusion with 29" wheels and 27 speeds.
Gears change with a click rather than the turn of a wrist like I've been used to. It's easier, but I have to adjust to which lever is up and which is down.
The seat goes back and forth as well as up and down and the handlebars can be adjusted to turn away or turn toward me.
The finer adjustments will take time and all of this is quite new to me. The bike is several steps up to what I'm used to, but it is fun to find out the proper setting.
Right now I have a new bike and I am grateful.