Got mine combined yesterday, and it was very nice and a lot sturdier than I had expected for such a huge figure. Aside from Hook coming apart a little while posing/playing, Devastator is like a single solid toy. Hasbro & TakaraTomy have done well on this set.
I only needed to look at the back of the box a few times to see how each Constructicon needed to look for their parts to join together.
It is imposing and impressive... and If I were to vote on a favourite 2015 toy, I don't think I could pick one out of all of the Combiners this year.
(unfortunately this is a bad timing toy, as it is distracting me from processing my BotCon photos and news)
While building it from the feet up... Long Haul on stilts. :p
http://www.toycollectors.com.au/blog/c834.jpg
With some random toys of different sizes, towering over all of them.
http://www.toycollectors.com.au/blog/c833.jpg
Climbing my Masterpiece shelf to get at the Autobots. (he's actually holding onto the shelving with his hands and feet)
http://www.toycollectors.com.au/blog/c832.jpg
The Autobots about to fire back.
http://www.toycollectors.com.au/blog/c830.jpg
It reminded me of the episode "City of Steel", which had Devastator climbing the Empire State Building like King Kong.