My Dato and my Langematik Perpetual just underwent a service in Glashütte. Each service was 2,2k Euro, which is for the level of complication a reasonable price point. Just on Patek level. Quality was perfect and it lasted approx. 14 and 20 weeks. I'm fully OK with it. Also my earlier service experience with Saxonja and Lange1 was fine. The service imho is an argument pro Lange.