I used to LOVE Memory Mixer. Their newer versions are not always compatible with modern computers (i.e. if you are running Yosemite on a MAC it will not work. When I was on a PC, I think the newer version had a problem with QuickTime). If she is using a PC, check first but it might be ok.
Before the problems with compatibility, the only thing I was really not able to do with Memory Mixer was use templates from the Sweet Shoppe. I could use my Sweet Shoppe kits. Memory Mixer was one of the first programs I used when I went digital. I did get Photoshop Elements but didn't love it and always went back to Memory Mixer. I would still be using Memory Mixer if I could get it to run as easy as it used to. In fact, if they could get it figured out so that I could run it on an updated computer I would switch back immediately.
I've switched to My Memories Suite 6 because it actually runs on my MAC. I haven't used it much but what I have done works fine and easy. I've been using it a lot to create cards for pocket scrapping from the tons of Sweet Shoppe kits I already own. It is super easy for me to do this with My Memories Suite.