It gets mixed reviews. My brother bought it and has mixed feelings. It doesn’t come with enough magnets, so you’ll probably end up buying more. Also, some of the plastic fixtures are a little flimsy. There’s good info about magnetic systems at:
http://www.airfieldmodels.com/inform...oard/index.htm
There’s info for building high quality fixtures, and he sells fixtures if you prefer to buy them already made.