I also have it (on Mac). It makes setting up and managing studio scene lighting ever so easy.

A couple of points though.

Firstly, as mentioned above, DO read the documentation/tutorial on studio lighting that comes with the product, because it really helps to understand what all the different studio lights are for, and how/when to use them.

Secondly, remember that this product is intended to replicate the lighting you would find in a typical (indoor) photographic studio, and I don't regard it as a "one product fits all" solution. If my scene does not really suit a studio lighting setup, I would not even attempt to use Render Studio to light it. For outdoor 'realistic' lighting scenes, for example, I always fall back to a single IBL plus one or two directional lights. But do experiment with Render Studio in different scenes, and you'll soon find when you prefer not to use it.

Oh, one more thing. Remember that the OpenGL preview display will only show up to 8 lights. If you are using more than 8 lights to light your scene, you may be perplexed (like I was) that changing some lights makes no difference to the preview scene. This limitation in OpenGL is the reason for that. The render will show the changes. (Also note that the "soft spot" light is actually four spotlights with a single control).

"If I were a shadow, I know I wouldn't like to be half of what I should be."
Mr Otsuka, the old black tomcat in Kafka on the Shore (Haruki Murakami)