Got simillar experience, and the inept performance of Firestorm on voice and multimedia (majaor difficulties viewing movies or losing sound). The viewers from them have never been very coherent in quality.
- Emerald : banned from sl as it was used for a DOS (Denial of Service attack)
- Phoenix : very good
- Firestorm : laggy, crashy, mutimedia not working well, **bleep**ty voice
Someone told me that in the people that developed Firestorn there were aslo teenagers. Sorry but I can't trust them.