Everyone says Sylenth1... I say 'yeah okay but also Hive!' That's not to say Sylenth1 doesn't deserve love. They are nearly identical in purpose and design but I still have a little more love for Hive I think. Hive has the ability to sound a little more digital and less warm--a bit harsher in places, which is awesome! The workflow and layout of the interface a little more efficient in Hive. People who have worked with Sylenth1 a lot probably wont notice this as much but I did. It's more modern in some cases, better effects and modulation tools. You can also count on UHE to keep the updates coming in a reasonable fashion.
The first soft-synth that I ever used was u-he Zebra2. It was wonderful and incredibly flexible with FM, Additive, Wavetable and a host of amazing features. It was almost like what NI Massive was TRYING to be and I loved it! unfortunately, after an entire YEAR, I had to face the facts that I just wasn't making tangible progress with it. In fact, I found myself disliking modular synths altogether.
I wanted something with the fat sound of u-he Diva but with Sylenth-simplicity that wouldn't leave me scratching my head. This is where u-he Hive comes in!
It's got an incredibly punchy and fat sound that exceeds Reveal Sound Spire, the new Xfer Serum or any synth that I dabbled with! and although it's limited by it's subtractive design and (as of this review) limited waveforms (saw, square, etc), it's a deeper synth than meets the eye and I adore it! :)
I'm grown to embrace that I'm more of a composer/arranger than a sound-designer. I simply don't want to spend too much time fiddling with osc's and filters when I could be writing notes and improving my productions. Hive goes up and beyond to deliver a next-gen analog-like sound in a simple CPU-friendly package. It's not as realistic as Diva, but it's got a modern sound and infinitely more versatile. I love it!