After a couple of weeks using Nearpod with a paid Gold Membership I am convinced it is worth the money. Using the "homework" option for lessons in class has allowed, particularly the older students, to work at their own pace and has totally freed me up to work with those who are struggling or those who need extra support with their behaviour.
Nearpod is definitely the right option for me, as a specialist across the school, because there are no class lists or student log-ins. They simply join the session with a 5 letter code and then add their name as they join. If I had my own class I would definitely give Blendspace more of a go but, as I already said, I am very happy with Nearpod as a resource in a blended learning environment.