I don't like it - TBH. I've seen sir slip a lot in action quite a bit - he had some sprinkled in decent appearances, but he's a gimmick, mostly. I wouln't say he isn't capable though. Just hasn't been as advertised thus far.
His former offensive coordinator Norv Turner once said "Alex Smith throws the best deep ball I have ever coached." Critics, doubters, and even 49ers fans and Chiefs fans who doubt Smith's ability to throw down field need to realize that Smith plays a style of quarterbacking that won Montana 4 super bowls in the 1980's before fantasy football and Madden video games were invented.... and THAT style wins games.