I started growing a few years ago using MG. However, as I slowly learned, I have learned that it is very easy to burn your plants or it is easy to get a nute lock using it because of salt build up. I now mix my own, but if I am not feeling up to it, I use Fox Farms brands such as Happy Frog or their multi purpose.
If you want total control, I would suggest just growing in Coco, The only nutes are the ones you add.