Pictures on other websites look better:
https://tf.takaratomy.co.jp/tf_mpg/mpg-02/
It is a lot of $$$ to dedicate...
if you're going to buy one, chances are, you're going to buy all six.
That's what's kept me away from the MP (and 3P) combiners.
Looks like each Trainbot will be about 180mm in height (for robot mode). I can't remember where I read... but combined mode may be the same size as the regular (non-Devastator/Devastor) CW/UW. The picture in the link seems to agree...
Ouch.