Dolphin have a pretty limited reputation. power screen reader users tend to avoid them. Because they claim to do speech and magnification as an all-in-one, public services in the UK went Dolphin mad for a while and seemingly any internet cafe or public library had the software available. Their guide software had a die-hard following, many people struggle to adapt to the new UI even though it's broadly similar to the old one but that's precisely because of it's market, people for whom change is very difficult.

I don't know anyone relying on Dolphin screen reader under the age of 40 if they use speech all-the-time; it just can't keep up on the modern web unless the user is very technically good. As a magnifier they seem to do fairly well.