It's just a more fragile figure. The plastic is a lot thinner and the joints are more complex and less solid than MP-10 or 13 or other bots of that size. I can happily manipulate MP-10 without worry. I'm not very good at transformations but something like Optimus or Soundwave I can kind of jiggle things about and work out the transformation. With MP-09 I'd be afraid of stressing or breaking something. It's not going to fall apart in your hands but treat it with respect. It's similar to some of the more fragile 3P figures such as GCreations IDW Optimus or Perfect Effects Lio Convoy, if you're familiar with those. Can't think of another official MP that feels quite as fragile.

 

I had V1 since it came out and he's still going strong, and i store all mine in a bin. I pull them out every now and then and transform and display them.