I have had my clicker cart for about three weeks now. Like anything new you just have to practice opening and closing it a few times.
Takes about ten seconds. Like others have said watch a few utube videos and then practice what you see.
The course I play the most is very hilly and in some places steep. The cart roles up and down the hill with ease. There are times when going down a long cart path that I have to use the break as a drag to stop the cart from pulling away works great.
I bought a refurbished cart from clicgear. So far I have used my cart 6 times and by the end of summer it will have paid for itself in cart fees.
I have drilled a hole on the left hand side for my pencil (opposite of were the tees are placed) makes it easier for me to access. Don't like sliding pencil under bungee cord. I also have a umbrella that works great to help give some shade. Might get a seat for it in the future.
One other bonus so far walking over ridding I find more balls on the course.
Just my 2 cents worth you millage may very.