When you turn it only takes a few seconds until GPS is available, even in the house! The Bahnschwimmzählfunktion worked on the first try (80 laps in the swimming pool) to a misappropriated train almost flawlessly. The operation is very simple, the data transfer to the PC works great. The only drawback in my opinion is that the training data is stored only on the Polar server. While there is an export function to your own computer in various formats, but you have to reformat every training individually. What's missing is that you can transfer external GPX files as a route on the clock.