Halo seems to be a very professional and very well ran piercing parlor....but in my opinion I think it's a little too high strung for what it is.
I've also heard of people getting their ear lobes pierced for 100 dollars at Halo, which I think is insane. I've pierced my own ear lobes a ton of times. Go to claire's and get it done for free. It's not brain surgery. They are more than likely going to get infected no matter where you get them done.
The pricing really isn't my biggest problem with Halo. I've been there twice and will never go back (unless I decide to gauge my ears again... they do have beautiful jewlery.) I have a bridge piercing and the reason I went was to get a new barbell. Each time I went in there they told me that they do not deal with bridge piercings, but they still would try to fit me with jewlery that just did not work at all. Going there actually made my piercing worse. I got a barbell that was too small that gave me an infection every two days (which can be really dangerous with bridge piercings). The next time I went back they gave me something that was too huge. I think...if you aren't really going to help someone out the right way, don't try to make a sale that puts your customers piercing and health at risk.