And I am a proud owner of the M5
The Monster Bertha is 1inch thicker, I don't know about the strength, I think its about the same.
The M5 great for moving things, vanishing..well yeah sure you can, but end up clean no.
Moving things great, you can do it in short sleeves if its somewhere else
But stay away from radiators and metal sides of table legs...you will make a loud CLANK!...
At the moment I love the M5 ^^ great "toy" too
But I would also advise to get the Raven, I mean everyone has that, personally I not one of my favourites, but I haven't used it in a while, it was when I was still new. Might get it out sometime ^^.
I also say get both, your decision on M5 or Monster Bertha though.
I have M5
I.D. has Monster Bertha
If you look in review requests should see some posts by us recently. Will post review soon after I have had a bit mroe expierience with it.
K