I don't have that particular device, however I have made homemade butter, many many times! And you are right, it is delicious.
I used to teach high school agriculture, and we would do a program called "Food For America", where we go into the local elementary schools and teach the kids about where their food comes from (this was in California). The butter making station happened to be the most popular one! We did it on a much smaller scale; each child, when they arrived, were given a Gerber Baby Food jar full of cream (we would get it donated by the local dairies). They were told to continue to shake their jars, while the high school students taught them about the dairy industry, showed them how to milk a cow, and had a calf there for the kids to pet (it was a mobile dairy unit that contained one milking machine - and the cow was milked while the children watched). Anyway, by the time the high school students were done with the educational part, the kids were told to open their lids, pour out the liquid, and see what they made. Oh the excitement in their faces! We then gave them crackers to spread THEIR own made butter on, so they could taste it.
We also made Ice Cream with them, using ice, salt, and several zip lock baggies. That was a fun one too!
