My first batch was with the Granny Smith apples from my backyard and Brett Lambicus. Damn it was TART but, having used only Gma Smith, that was to be expected. The last time i tasted it was a month aged and it has begun to develop an interesting funk and that sour taste typical of Lambic brews.
Brett, IMO, requires aging. It subtly changes over time. Don't make this if you are going to have a hard time resisting drinking it. I have one bottle left and I am trying my BEST to cellar it until next year when my tree produces again. The others just didn't seem ready, but again this could have been because of my choice in apple.
Also, don't make this if you want a sweet cider because Brett just goes buck wild on sugar.
Definitely give it a go, I'm going to try it again, but next time on a sweeter, more mild combination of apples to get a hopefully more relaxed taste.