I had a fitting at Club Champion a month or so ago and got the Ai300. I was fortunate as the club head came in the day before. According to my fitter, I was the first person to pick them. I am 30 and have a high swing speed, so I have a 105g Iron shaft. I love the clubs.
One thing to note about these clubs - the lofts are pretty strong. The 4i is a 20 degree loft and my 3H is 19 degrees. You do get some extra distance because of the lofts, but if you are happy with the spin and feel, then it doesn't matter. For instance, the TaylorMade Qi 5i is 23.5 degrees and the Apex Ai300 5i is 22 degrees. That's a pretty big difference. You may need to consider your gapping - I needed to add another wedge when I made the switch to my new irons.
Regardless, these rock. They're fantastic clubs and I couldn't be happier. I definitely think they are "ceiling" irons.