Just received my new gear from B&H, very good company to deal with by the way. I purchased the new Sigma 150-500, BG-E3 grip, Manfrotto 676 monopod, and a Giottos ball head. I am very satisfied and the lens is MASSIVE. Took it out for a few quick shots, and the stabilization is very handy. Can't wait to take some good wildlife shots and use it in Kenya in a week. If anybody's considering this lens, go for it. Its big though! ...sorry for the short/crappy review.