About half of my collection consists of EMs. Keep in mind these have been made
from 1931 thru 1977 or so. There are several catagories of EMs so best to
specify which type you are considering.

Most folks that have only SS pins consider only the later EMs. My list of
good ones from that era are; Wms Aztec, Bally Fireball, Bally Capt Fantastic. The list
of machines to choose from is very long and there are many stand outs!

The good points of EMs; the artwork is usually much better than later games.
They can be fixed easily with common tools. In many cases parts are more
available. Unless they have been badly abused more mechanical problems
can be fixed. Game play can be suprisingly good with many features.

The bad; to fix them you need to understand how they work and not everyone
is willing to spend the time to do this. Since they are older you'll come across
more that are in bad shape. Game play on some can be slow and repetitive.

The ugly; bad backglasses are the bane of older pins. Usually due to flaking.
And all too often cabinet artwork has been trashed requiring a re-paint.

Personally (and I admit to being biased) I feel a pinball collection is not complete
without a nice variety of EMs. Hope you jump in.
Steve