Wow so many replys and seems like most of you think that compileing is best under linux.
I was following a guide here on bitcointalk and used the good description in the wallet and created the QT under windows 10. It still took about 1,5-2h for setting up all the dependencies etc.
Under linux you could easly completely perform a fresh install, includeing the gui wallet for linux ^^
If you use the gitian method, you do have to realise the gitian descriptors for windows, linux and mac are different... So to build a wallet for both linux, windows and mac, you'll have to start the build process 3 times... However, all initial setup can be re-used for compiling those wallets (in other words, the setup has to be done once, but the build process on this setup has to be repeated for each OS)