I tried 5 different programs before yours and none would work so perfectly. PowerShadow works beautifully and couldn't be easier to install!!Thanks; 在买你们软件之前，我试用了5个别的软件，但没一个管用。影子系统性能非常好，非常容易安装。谢谢！ - Jeff Chandler, UBC （加拿大哥伦比亚大学Jeff Chandler） 　　PowerShadow is amazing. PowerShadow has also reduced illegal software from being installed on the computers by students. I highly recommend the programme for multi-user environments. 影子系统真厉害。它可以减少学生在公用电脑上安装的不合法软件。这款软件我想推荐给多用户的机器非常合适。 - University of Technology, Sydney NSW, Australia （澳洲悉尼理工大学） 　　The product is working well. Wish we had it years ago.这个软件太管用了！要是我们多年前能买到它就好了。 - Risk and Emergency Management Office, Vancouver （温哥华风险及紧急管理办公室） I thought your pricing strategy was fantastic. The price can't be beat. PowerShadow has all the features of Exchange for a fraction of the price, and it runs flawlessly. 我觉得你们的价格策略做的很好，这么好的产品，这样的价格实在没得说。你们的产品性能和价格结合起来，简直无人能敌 - Mark H., Hydro Ottawa, Canada （渥太华电力）