It's not actually 5 for $100, more like 8. They always have a +2 frag special, and they normally throw you an extra piece. Sometimes they have double soft coral plug specials, so you get 14-16 soft coral frags for $100 plus shipping. I normally get a frag pack and 40 reef janitors, which are a nice mix of snails and crabs, all kinds.
They have consistently arrived in good condition.
If you want SPS frags, just tell them no soft corals and I promise you won't be disappointed.
-Josh