I thought Dark Days : The Forge was pretty good. Snyder seems to work better when he has a co-writer, since Batman #44 was also pretty readable compared to the rest of his output. That said, I'm likely going to skip the METAL event. I also think Capullo's cover for the first issue is pretty stupid.
Also, has The Flash ALWAYS been this boring? I picked up the first few issues when it started as I liked what I read of Nailbiter, but dropped it shortly after because it wasn't doing anything for me. I then jumped back into it after The Button, and I've found the past two issues to be really unengaging. It's also a little too....bleak for a Flash comic. The stuff with Reverse Flash is kinda cool, but unless they do a full removal of Flash: Rebirth from Barry's narrative, I don't really have an interest in where it goes.