Disclaimer: I've used Klik n Play and MMF years ago, so this review could be biased.
- No programming involved (at least for basic components, which made it friendlier to non-technical persons)
- Super easy to make 2D games or applications
- All you need is a little common sense and creativity and a little math maybe
- The design metaphor is perfect for making games
- Make it possible to get from planning to release in a short while
- Learning curve good enough for kids and even grandpas (I myself used KnP when I was 13)
- No programming involved (which means any bugs inherent in the core component of the game will have to referred to the tech support)
- You'll probably have to try programming using stuffs like Unity or the like to deliver 3D games, since Fusion's 3D support is pretty new and buggy
- It would really help if Fusion has free stock objects or arts somewhere to assist users with not so much creative resources
- The design metaphor makes it kinda stuck to only making certain type of games (although to be fair, lots of DLC objects are there to help create whatever you have in mind)
- It is more suited to indie/solo development than a large distributed team dev
- It could use more on-disk documentations to help first timers
I've seen a lot of improvement from MMF, and less bugs too. Overall, the software still remained true to its root as a tool to help non-technical people make games, so I'll recommend it to those who lack the technical skills to make a game but still very much want to do it, or to veteran devs who felt the need to go easy a little while and do drag 'n drops.