You can download the demo version before buying to see if your computer can track the level of processing power. For those who complain that this train, it must be remembered that to treat a native file 10 to 20 million pixel is fast on any computer, you better have plenty of RAM and a fast processor and ideally store photos on a RAID and catalog and cache on an SSD (in my case). But if using LR, one makes the picture seriously and the investment is obvious. The latest version brings geotagging and creating digital books, a real plus. I tested Blurb for a wedding, the quality is top and the swatch is free, geolocation is fun and well integrated. A 80 flash sale is given, thank you Amazon.