Quoted from jmpinball:

I own the Pro and I don't regret it at all. The premium is too expensive compared to the gimmicks it offers. I found the magna slings to be poor overall. When they decide to work, they are cool, but most of the time the ball will just limply bounce off the sling to the flipper. Need to hit it closer to the center to get them to work. Ecto goggles is interesting, but has few animations, limiting the "wow" factor. The only thing I actually miss is the ball lock feature, but that alone isn't worth the price.
The price difference between the two (~$2000) buys a lot of mods, and still leaves you with a good chunk to have a starter fund for another machine. Pinside tends towards expensive tastes, so my experience may not be yours.

Quoted from Who-Dey:

Magna slings obviously are not for every pin and are not the way of the future, but they fit this pin and theme perfectly and are great fun. Magna slings are the sh*t for horror or ghostly themed games. I have gotten a bunch of entertainment and laughs out of them.