I have bought a number of courses from the Centre of Excellence and have completed a few and am working through the rest. It is miles ahead of other course providers in terms of quality and value for money. You get lifetime access and the website is easy to navigate. The courses are well-structured and you can either print the material out or order a copy ready printed if, like me, you appreciate having both online and hard-copy access. The material itself is comprehensive, well written, and easy to read. The videos, photographs, and other graphical images are also crystal clear. I will happily be working through the courses I have bought for years to come. They are in-depth without being too difficult to follow and a joy to learn with. I use excel on a daily basis and bought the advanced excel course as a revision tool. I was impressed with the coverage and learned a lot more than I expected. I highly recommend the Centre of Excellence, their courses are fantastic and the range of courses unparalleled.