Welcome to the forum. Full disclosure, this is ATP’s website and all of the mentors here went to ATP Flight school. That being said, I have only heard of Aeroguard in passing and have never met a pilot that graduated from there. They might be a perfectly great school, I am just not familiar with them.
I would encourage you to do your research and compare them to other schools. I recommend using this list of questions when speaking to any flight school: