I like ARF's but there quality is a point of frustration sometimes. I have had particularily bad luck with several Hanger 9 products lately with (hot)glue joint failures. To include the landing gear block on my FuntanaX 100 and the firewall on my Spitfire 60. The covering on 95% of these ARFs will need some work after opening the box to find what the wrinkle gremlins have been up to. So, I guess I have just gotten to the point where I expect to have to do this every time... Hey it's still easier than covering the whole plane. I have kit built a few planes now and I can say they all flew and have not had these problems... also the satisfaction of flying a plane that you build from the ground up can never be matched by the maidening of any ARF, I don't care if it's a Chip Hyde design Prototype that no one else in the R/C world has ever seen before. If you build it, it just means more to you to see it fly.
Here are a few threads that discuss these problems and some people's creative fixes:
http://www.rcuniverse.com/forum/m_5974744/tm.htm
http://www.rcuniverse.com/forum/m_5777028/tm.htm