MetaBones Speed Booster Adaptor

So, do I understand the MetaBones Speed Booster Adaptor correctly?

MetaBones Claims:
Increases lens speed by 1 f-stop, increases wide-angle by .71 multiplier, increases sharpness, increases shallower depth of field, and retains full autofocus capability?

So (doing a little rounding up on Panasonic lenses):

...a 7-14mm (14-28mm in 35mm equivalent) f4 becomes a 5-10mm (10-20mm) f2.8, 
...a 12-35mm (24-70mm) f2.8 becomes an 9-25mm (17-49mm) f2.0, 
...a 35-100mm (70-200mm) f2.8 becomes a 25-71mm (50-142mm) f2.0, 
...a 100-300mm (200-600mm) f-4-5.6 becomes a 71-213mm (142-426mm) f2.8-f4...

...and a 25mm (50mm) f1.4 becomes an 18mm (36mm) f1.0?

If it really works as stated, and with shallower depth of field... ...then...

...Wow?

And what about the 9-18, 12 2.0, 14 2.5, 12-50, 45s, 60, 75, 40-150, etc?

Cons?:  adds a little length and weight to m43s concept, and of course $599.00 out of pocket...

But, hey...