CriticaI wrote How does it compare to other nosql?

Too vague of a question, really. What are you trying to compare? In general, Cassandra functions similarly to a regular SQL database. As far as I know, Cassandra is more widely adopted where performance isn't a major factor.

CriticaI wrote How does it compare to Redis, speed wise?

Redis is generally faster, but you most likely won't notice a difference with small applications.

CriticaI wrote Is it easy to setup?

If you're good at following instructions, it's not difficult. It's not as easy as "apt-get install cassandra", unfortunately.

CriticaI wrote Is it easy to use w/ PHP and JS?

It's more or less the same as MySQL in terms of difficulty. There's no built in support for Casscandra though, so you'll need to use a 3rd party library.

CriticaI wrote I'm wanting to make something with NoSQL databases and I'm thinking about trying out Cassandra.
But I don't know a lot about it.

If anyone has used Cassandra I have some questions.

How does it compare to other NoSQL?
How does it compare to Redis, speed wise?
Is it easy to setup?
Is it easy to use w/ PHP and JS?

How does it compare to other NoSQL?

It depends on the application. If you are building an application that requires fast searching, then Cassandra would be a bad option compared to Elastic Search. If the application is dealing with big data, then again, Cassandra is a bad option compared to Hadoop. So it really depends on the application.

Is it easy to use w/Php and JS?

It's not built into PHP but here's a 3rd party library - [ Register or Signin to view external links. ]