I have used casein based products (like protein desserts and protein hot chocolate) before bed, but I haven’t reordered since hearing a study that said the type of protein you take before bed makes no difference. I posted the link to that podcast in the thread for 187.
After hearing that it may help you sleep as well as provide protein from Chad, I did reconsider, but googling “casein” and “sleep” threw up loads of stuff from body building forums about it disrupting sleep, so I haven’t bothered. I have a good stock of whey, not sure I need more taking up space for questionable benefit.
fwiw, I normally mix my whey (including evening/ before bed), into 100g of zero or low fat greek yogurt rather than have it as a shake. The protein in greek yogurt is pretty much just casein, so I feel I’ve probably covered both bases!