Accuracy-wise we think it's almost there but probably still a few iterations away from being perfect. It's great at eliminating a lot of the collection time though.
Interestingly, we're working with B2B clients right now where we use Webhound to curate and then act as the "validation" layer ourselves. The agent lets us offer these datasets way cheaper with live updates, but still with human oversight.
The indian company I mentioned earlier mainly had exhibitions and events as clients. These clients usually need huge datasets rather than just a few leads, which makes them a good target market for a tool like yours.