I bought a 2020 SLR7 - It has Ultegra Di2. I was riding a Specialized Roubaix before and the difference is very marked. I find the Domane more comfortable and also MUCh more stable on the downhills. The Roubaix used to rattle and roll, whereas this bike is like a sure footed mountain goat. I put on a pair of Aelous XXX4 from the off as I wanted 28c tyres. It really is a joy to ride. Weight wise it's about the same as my previous bike, but it is definitely giving me confidence to go faster on the downs and is not holding me up on any other flat or climbs.