[JimR]

I have 400 plants in S/H with wonderful results. There are a few of my plants on Ray's picture page for S/H. I've been using this method almost exclusively for about 5 years and rarely repot. I water weekly in the summer, but can go two weeks when I need to. Winter I can go a month without adding water since my intermediate and cool growers are not really growing at that time. I did not realize just how wet it stays in the pot until I went to do a talk at an orchid society 3 hours away from my house. I had not watered in a month (Feb) and my vehicle was full of plants to display as part of my talk. I got within 30 minutes of my destination when a young gal doing more talking on her cell phone than driving, hit me and spun me around at about 70mph. I went up on two wheels and back down again, sending all of my plants into my lap. The media was still quite wet as my pants attested to.
I'll echo Rob. Try it on a couple of plants first to see how it performs in your environment. Also, follow proper repotting techniques. Move them when there are signs of new root growth.