It is hard to find fault with Soundiron's Theremin+, especially considering it's very affordable price. Some will dismiss it's niche sound, but those who dig in will find pads, ambiences and textures useful for much more than just summoning monsters, ghouls and aliens.
Thoughts, demos and more: http://bit.ly/2g6fF1P

Theremin+ is available from Soundiron http://www.Soundiron.com