I was in search for a pedal that could do everything from subtle spring reverb to huge modulated hall reverbs and Strymon Big Sky does that and so much more. This pedal is packed with a lot of cool sounds. Not only do they sound amazing but they are really useful and easy to manage.
For ambient sounds and such I use bloom, cloud, chorale, shimmer and swell. They all have their own purpose in my sound and all sound really great! Shimmer combined with a volume pedal gives great synth-like swells. For my regular playing I use mostly spring and plate reverb and they sound great as well, I usually just turn the reverb on my amp to 0 and use this instead.
Pros: wow, where do I start? The sounds that come out of this thing! The size and weight, lighter and smaller than expected, I am still amazed by the greatness in the sound you get from such a small source. The patches and how easy they are to store and tweak.
Cons: the only thing I can come up with is the price, but I can see why now that I own one myself, and it is worth it. Studio-grade reverbs in a stompbox is all I can say.
Summary: If you use different reverbs, need the great sounds that this box produces, need the ability to store patches and have the money, don't hesitate!