This was bought for my 4 year old for Christmas. It is now late August and the Batmobile is still in play, but fairly broken. Not yet terminal I must add, as it does clip together reasonably easily. However, the "ball and socket" design that allows the roof to snap back on / off also means that the "ball" part does eventually sheer.
This is not all due to over enthusiastic play. There are vast numbers of different Batman on the market. Some fit. Some don't. So, logically, children take the roof off to get the toys in.
Our Batmobile is now a convertable with a slightly dangling wing. I guess you have to work out how much 6 months of joy is worth to decide if you think this toy is expensive or not.
What I would say is DO NOT let this Batmobile get chucked in your toy storage during speedy pre-TV cleanups along with all the other stuff. ENSURE that it is not stood on or sat on. Repeated knocks will eventually tell. If kept on a shelf (out of reach of the under 3's) when not being played with, it might well last longer than it did for us.