I've had a LV steel top for 15 years. They are good in almost all ways. They stay flat no matter how big a router you hang under them and most routers will mount in a minute or two. The one big drawback is changing bits. You need to have access to the underside of the table somehow. Either in an open stand or prop one side up if you have it in a larger table. It is fairly heavy which makes it a little hard to manhandle. Also on the up side though are all the accessories available like table mounted guide bushings, the LV micro-adjust fence, etc. While you might have to replace a sagged insert plate, you will never in your lifetime need to replace this table top. Someone will probably still be using mine 100 years from now.
Someone I consider a master woodworker once told me that a master woodworker is not someone who never makes mistakes. He is someone who is able to cover them up so that no one can tell.