Overall a good product that is worth the investment. If you are buying this for the backplate, then no it isn't. The plate was actually made for one of the other KO/3rd Party versions of MP-36. The dimensions are off and as a result, it wont fit.
If you are buying this for the Cannon, then totally worth it. I got this as a counter-piece to MP-44 so I can have Peter Cullen and Frank Welker's voice. Worth it, worth it, worth it! Cannon is in a darker tone than the original, and has a purple light in the front when fired. Easy to install the batteries and go.

I was really looking forward to having Megatron speak english with Frank Welker voice clips but I am sadly disappointed with this purchase. The sound quality is garbled and loud and tends to reverb. On mine the LED does not light up AT ALL though I believe it is supposed to. After encountering these disappointments I did not even remove the Kreemzzks out of the package nor the backplate.

Great shopping experience

BACK PLATE:
The colour of the back plate doesn’t fully match the colour of the figure. The plate doesn't fit properly. No instructions included. Based on the other reviews here it’s not just mine.

SMALL ELFS:
There are two “krimzees” in blue and purple included. I only remember a yellow one from the cartoon, but I may be wrong.
No value added if you ask me personally.

FUSION CANNON:
The colour of the fusion cannon doesn’t fully match the original, but it’s pretty close.
The fusion cannon extends.
The sound quality varies between the different phrases/sounds.
Transformation sound is incomplete, a few milliseconds are missing at the end of one of the transformations.
There are four sound settings, two with phrases, one with transformation and one with firing sound.
Blast/firing sound is weak.
The LED flashes with the sounds.

OTHER:
At least Megatron speaks English now and the LED in the fusion cannon is something added. The colour of the LED matches that of Shockwave (MP-29).

I don’t have to worry too much about forgetting the batteries inside for a long time in case they start to leak, since my original fusion cannon is safe in its box.

The back piece doesn't fit. Needs to be modified to stay on at all and even after modification it doesn't fit perfectly.
The fusion canon didn't work straight out of the package and needed to be opened to remove a loose bolt that was interfering with its function.
Phrases sound echoed not direct.
Transformation sound is incomplete.
Blast/firing sound is weak.
Light only flashes and is fine.
Light only flashes with phrases.

- Sound bytes and or speaker is poor quality (tin can sound)
- No Laser sound
- Transforming sound cut short
- Back plate does not fit at all. Tabs are not lined properly. It just pops off.