Does your copy of Sigma 17-50mm have/not have focus issues?

Hello guys,

Would you mind you kind of talk a little about the focus accuracy of your sigma 17-50mm?

Recently bhphotovideo dropped the price of its 17-50mm Sigma OS HSM by $100. Now I am really considering taking the plunge and getting a copy for Christmas. All user reports are very favourable, and have no mentions of focus issues. However, since I am from Canada, it may be a big hassle to get focus issues sorted out if I buy from bhphotovideo. This is why I am asking for your input. Thanks a lot!