Rating: 2 stars

None of the links on the developer website are active. So communication is not available.

Rating: 3 stars

Basically an important block, but useless because, you can only put in text blocks.

Rating: 4 stars

It works great but only if you only use of set of Tabs in one page. If you wont 2 or more, it puts new tabs on first set.

Rating: 5 stars

It does what it says in a very unobtrusive manner.
Very useful block.

Thanks