SO I totally understand the complaints about this guy, but honestly I love that he's so freaking wacky (the first word I said when I actually opened him was 'nuts'). Though the lack of sideways movement of the head is a shame, the tread and crane arm add a lot of character, and personally he's my new fav of the constructions because he just looks so weird and alien (though Scavenger was always my favourite of the bot modes seen in the films so I think he'll top that)... but once all the parts arrive I think they'll be staying in combined mode anyway.
Crane mode is fine, looks realistic and fits with the others.
Definitely recommended !