What about foam crown molding? Putting up etc?

Easy, Clean accept joints not so good. but then joints always need extra attention......

I had this in a home at the entry to the living room. They look so real as beams.

But to touch them you knew different. They were as braces to the beam

So if your putting up foam crown molding no one would really know.

It may be difficult to cut edges though.

The foam stuff cuts like a dream, but just like the wooden stuff you have to be able to find nailing, even if you plan to use construction adhesive. Some products have inside and outside corners available so there are no miter cuts (which is where most confusion and problems occur). You can expand the look of your molding by first installing a wide baseboard upside down (ogee detail down) at the top of the wall or on the ceiling this option would assure that you have plenty of nailing for the crown but may require extra attention at the corners.

There is also a crown molding system that will allow you to run a wire from an existing electrical outlet around the room to a new outlet. That system uses strips that are attached to the wall and ceiling and then the face of the molding snaps in. The corners are premade in that system and you could use it even if you were not expanding you electrical.

Usually crown molding is not where you start learning about woodworking, but if you are patient and have plenty of stock you can get there. If you are planning on doing mitered corners a good saw is essential. I don't imagine a first timer will enjoy the result of using a hand saw and miter box.

Also, whatever type you choose, foam or wood if you have a long wall you will want to use a bevel cut to overlap the ends. Just butting the end together is wrong and will show as poor skill. This does not apply to the system that snaps into a track, that sysem has "connector" trim and you just make the ends meet in the middle of the run of wall.

Hope this helps.