Harp Time is the first Harp VSTi that I've tried. To my knowledge, there is not something that is like it.
My initial reaction to HarpTime was: why would I need a Harp VSTi?? After playing a bit with the instrument, most of my new compositions now include HarpTime!!
The quality & sonic richness that HarpTime delivers, cannot be reproduced with a sampler. It's sound is beautifull and is also very usefull outside of your classical / orcestral piece, it can be used as a Plucked with Character.
Sound - I gave it full 10, simply because there's nothing else like it. For a Harp emulation, without GB's of samples, it delivers VERY well!!
User Interface - Probably not the most inspiring interface, but I'm sure variations are sure to come. It gets the job done, so 7 out of 10.
Documentuation - It's fine :) The instrument is not overwelmingly complex, so the documentation for my taste is more than adequate.
Presets - One can never have enough!! It includes about 40 presets, and they range from something that sounds like a harp, to what you'd prefer to use a synth for. Overall, the quality of the presets is good & very usable. I'd say at least 1/3 are very usable / inspiring so 7/10 here
Customer Support: as good as it gets, personal responses to my every question thus far - very promptly. 10/10!!
Value for Money: Depends on what you are composing. But if you do need a harp / plucked - 9/10, I'll use HarpTime over a sampler any time (sorry IK)
Stability: 10/10 - I've yet to see a crash in the product release.
Performance: Doesn't really exist, but HarpTime does leave much to be desired. A harp time in your mix is not subtle ;) And I dont mean in terms of sound. It's on the "to be enhanced" list. 6/10 here :-(
Overall: 9 our of 10. Buy it!!!! Buy it just to listen to it, to play with it, and it will inspire you! The sound is gorgeous!!! Harp Time is rich, warm, it plays nice, but it can also bite! Very expressive physically modeled VSTi!