BaLens useful or not?

I have a Nikon D7000. I have read mixed reviews on the BaLens. Some love it, others say the camera does a better job of assessing WB without the BaLens. Would that be the case for my Nikon D7000 or were the people who did not like it inexperienced in its use?

People who complain about the automatic white balance... lol... well, don't do it auto. The D7000 is a killer kit, it does a great job. Auto white balance is a limited function, learn what white balance is so you don't have to worry about the reliability of the cameras ability to do it for you. Its really simple, theres a kelvin scale, and there is a tint scale, and further, since you're shooting raw you can change the white balance after you shoot without altering the image.