Ok, I just looked at what I could find on the Eventide H9. I love Eventide products but given I have a few of their products it would make no sense for me to get an H9.
On the plus side, I love the idea that you can edit parameters on the IPad. I just wish they would right an app for their other boxes. However, it seems they are doing this because they have miniaturized the box now with a micro LED and XYZ buttons and a big knob. I guess some like this style and it is a further development of the X and Y knobs on their other boxes. I understand why they did this but at least with the other boxes when you move a knob the LED indicates the parameter being changed. So, unless you want to be driven crazy by the tinisized form you have to have an IPad?
They also combine select algorithms from the other boxes with an option to buy more. Nice marketing. You know that people will end up spending more on algorithms than if they bought all the current boxes. Well, I can't really say that without seeing The price but that is my guess.
What I would have liked is a rack mount unit with all the algorithms from the current boxes, large display, 3 hot knobs, added algorithms from their rack mount effects, MIDI, USB and IPad access and multi pedal plugs. CV control would really have been a plus.
So, I know many are going to love the H9 and in terms of sound the Eventide algorithms are great but I just don't see this one as a real innovation, just smart marketing.