Well, I've spent several days with the Tamagotchi Pix now - enough to have plenty of thoughts about how it runs and handles.
Unfortunately, the biggest negative for me is the touch-only controls. I've encountered lots of misinputs (including impossible ones, because sometimes it will read the A or C buttons as the B button in spite of my finger being nowhere near the B button) and frequent unresponsiveness (which sometimes makes the games impossible; The ping pong game that appears in the arcade on sports-themed days is particularly nightmarish). Also, like all capacitive touch devices it's not quick or precise (which causes problems with some games that seem to expect faster inputs than are physically possible with capactive touch - it makes me wonder if there actually were physical buttons at some point during development). The dimples denoting where the non-existent buttons are make this worse because they can interfere with sliding gestures, and in the end I can't see why the device doesn't combine a touch-screen and physical buttons, as Japan's upcoming Tamagotchi Smart does. Regardless, there are plenty of fun and creative ideas here, but controls-wise it does feel to me like it's more negative than positive.
As a side-note to my view on the controls, I find the Pix to be a bit of a chore to navigate, through a combination of the above-mentioned issues, some unusual interface choices (some actions that appear in the menu can also be performed with a touch-gesture from your Tamagotchi's room whilst others that happen more often require you to navigate through the menu in order to initiate a gesture, some items will start with the pointer on "No" by default and others don't - that sort of thing), and through expanding some actions from the single button-press that they've always been to requiring menu-navigation
and a touch-gesture to perform them. This will probably be plenty of fun for a kid who hasn't owned a Tamagotchi before or for those who don't mind slower-paced versions, but for me, who's been into them ever since they left Japan in 1997, it often feels like busy-work that extends the time-investment that the device asks of me. Making this worse is that the Pix uses the Meets/On style of having six points on the hunger meter, coupled with a very long happiness bar - because the controls slow down my interactions with the device so much, it takes even longer to deal with these things than it did on the Meets, which already bordered on unreasonable by my standards.
The sound is nice, and has a similar tone and feel to that of the Meets, but it's
extremely quiet. If you're carrying it in a pocket or a bag it's not very likely that you'll hear it.
The camera is considerably better than I expected for a device of this type, which was a nice surprise, and there are lots of fun ideas that use it. I particularly like how well the "Explore" option identifies colours and allows you to meet Tamagotchi characters that match the colour-scheme of what you're pointing the camera at. The screen is also nice enough - it's about what you'd expect if you've used a colour Tamagotchi before. Mine has a spot towards the top-right where it's obvious that the backlight is closer to the display panel, causing a bright blotch in that location, but this isn't unexpected in a device of this price, and I've seen worse screens in more expensive devices in the past. It is a pity, though, that there's no way to retrieve screenshots from the device - I can understand if it prevented you from copying photographs for safety reasons, but being able to grab the screenshots easily would be a boon for Tamagotchi loggers!
And, last but not least, it's nice to see a modern colour Tamagotchi release that comes close to the smooth animations of the Game Boy games from which the colour models were descended!
All in all, the Tamagotchi Pix takes a number of cues from the Tamagotchi Meets/On in how it plays out, and it re-uses some things from that version, though it doesn't have the genetics system. There are plenty of fun ideas to make this version unique and a great many of them are well-implemented, but what will make it or break it for most fans, old or new, is the capacitive touch controls and your tolerance for them and their issues, which unfortunately, for me, overshadows the entire experience. If you can try one out before you buy, I would suggest that you do so - it's certainly not without merits by any means, but I feel that, at £60, it's too expensive of a toy to take a gamble on.