One of my friend has great dane, his dog is very friendly and unlike gsd and rott, this dog welcomes everyone and from my point of view, this breed need some sort of training to perform as watch/guard dog. The only problem my friend face on his dog is leash control, you need to be more powerful to handle this breed while taking him for walking again this can be sort out by leash training. All the best for your new companion. As far as i know vidane kennel is good for great danes. Do through check and buy dog only from prefessional breeder not from pet shops.