I've read several threads talking about the different MBP cases, people's thoughts/recommendations, etc ... Anyway, I've decided on the WaterField Sleeve Case, so I'm not here to figure out which case I should get. With so many options available on the WF Sleeve Case, I'm here to figure out which ones to get. Do people get the flap? What about the pouch? Is it necessary in order to carry such things as the charger, mouse, flash drive, etc? Any input is appreciated!