I've used AIT for over a year now for my own store and test site for other sites. I've had very little trouble, and they've always fixed it in less then a day. The only problems that have occured to cause noticable downtime was my fault, and they fixed it. Only possible complaint was recently the mysql server froze and it took them over half a day to fix it, but it's not very bad. I have the 18.95/mo bussiness plan, and will soon be getting an I-MHIP plan for hosting more sites.