I don't think I would jump ship now. That is like switching guns in a fire fight and the other gun only has one bullet, when the previous gun I had a truck load of bullets.
I do have experience with other brands of bricks. The first one is a Mega Blocks rocket set my mom bought, like a curious kid I tried them with my LEGO bricks and they did not grip together at all. I even remember asking my mom why she bought the set, I got the typical cost answer. The second one is some sort of bigger brick (my mom bought, again) with tabs on the sides (I wish I could remember the name of them). I did like those you could make a OK snake or similar animal with those bricks.
I do have older K'NEX, if that would count. It started by getting a small set for a present, then I end up buying a big set. But that was pretty much the end of that. I guess I got plenty of them and I just wanted ideas/instructions for the rest of them.