This appears to be in the same range as a Tombo Chromatic S-50, with similar setup. Except the sharp notes are in the lower rank rather than in the upper. If I were to get the Seydel, I would swap the plates top to bottom, as it makes more sense to me comparing it to a keyboard instrument.
Another chromatic harmonica in roughly the same price range is the Suzuki Soprano Single (and its companion Suzuki Alto Solo). That is an all-blow chromatic harmonica set up exactly like a piano keyboard, with the "black-keyed" notes positioned above the naturals, whereas the others are essentially two solo diatonics in C and C# joined together.
Among the three, the S-50 may be the easiest to play. (It's the only one of the three that I own.) The hole spacing on the other two may not allow fast playing; I'd like to see videos of both to discount my doubts.
Tom