Mine fits fine apart from the horrible compromising of the weather sealing.
Had one issue where the cameras front control dial wouldn't operate with grip att. A hair accross the pins was causing the problem.
The pins are sprung, if you have to apply force then something is wrong somewhere.
Canon 7D, T3i, EOS M, EOS 3, GoPro HD Hero & Hero 2, powershot sx230 hs, Canon 70-200 f2.8 L, Canon 100mm f2.0, Sigma 70mm f2.8 Macro, Canon 50mm f1.8, Canon 22mm f2.0, Sigma 18-50 f2.8, Tokina 11-16 f2.8, Lensbaby Composer, Holga HL