I jumped from MS to mac a few months ago and I kept a dusty cranky Laptop purely for CU.. In the end my frustrations and costs of running one MS machine for SeeYou became too much... Just keeping the anti virus running cost more than Codeweavers so it was a no brainer when I found SeeYou would run.
download the trial version of each and once running register rather than reinstalling.
Installation was very easy from downloading Codeweavers and SeeYou to viewing my first flight was 5 mins.. Just keep clicking yes/agree do not try to be cleaver.. The zoom in and out is dramatic and best only done via the buttons on the tool bar. 3D does work but sometimes freezes for a few moments. Everything else seems pretty much as per SeeYou in MS.. Even airspace, maps and turning points are all automatically updated as per normal. It is a high silver rating..