If it's working,a nd continues to work for you, then that's fine. Are you planning on keeping up regular training with your dog?

The onyl time I have ever heard of anyone sending their dog away to a training school, it cost them an absolute fortune, teh dog came back fine, continued to be fine for a while, then got worse again and got rehomed. The owners had been taught the commands the dog had been taught, but the thing was, although the dog had changed, the owners really hadn't, so the previous behaviour resurfaced.