I know this post is a few years old, but I live in Mckinney and this dojo is about 15 miles away from me down 75. It is about 20 minutes drive time. I have only practised sporadically as I mostly do BJJ, but I can say the mats are probably the thinnest and hardest in the metroplex. You will need ibuprofen if your rolls/falls are not that great or if you are still working on them :-)
http://www.aikidoplanodojo.vpweb.com