I received my BBI Sherman last night. It was everything everyone has said it would be. It is an awesome model! At $33 from Bad Cat + $10 shipping it is the same price as 21st's M-4 from WM. The detail is exceptional and all the little accessories are just great! Too many to list! But a few worth mentioning are: (2) crates of 105mm HE rounds, the sub-MG (not sure what it is but looks like a Maschinenpistole MP-40), binoculars, ammo cans and loose jerry cans. Markings! Did anyone ever notice there are no markings on the 21st WM M-4? Maybe 21st did this so you could customize them and not end up with a platoon of 5 tanks with all the same number. (Tiger I ring a bell) But who is the commander yelling at? I wanted to put my Patton figure standing in front of the tank and take a pic. I bet the tank commander would get more than a slap for yelling at the general.
I only have a few cons:
Track spacing, the tracks are narrower than the tank hull by allot. Referring to illustrations and photos in my Squadron Signals book on the Sherman this isn't right.
Glossy plastic showing on the castings for the suspension.
The engine detail isn't up to par with the T-34 I saw yesterday. http://tanxheaven.com/t34workbench.htm (I'm kidding)

Overall it is a great compliment to the 21st Sherman. I must have another!

mondaytanker