I want to treat myself to a manicure, but blah! I don't know what to book.

Is there any real difference between any of these types of long wear manicures? Shellac seems to be the cheapest kind (at least in my neck of the woods). My nails tend to be soft, I got one of these done before and my nail was a bit harder, which I liked. But I can't remember which one I got.

Help? Preferences? Is it ultimately a waste of money.