For mental health, I've found it a great relief from Gmail. If you feel your mental health is affected not only by noise, but also privacy violations, supporting monopolies etc.<p>From a designers/UX perspective, there are some thoughtful touches. "The feed" is not just a bucket/folder, but the UI changes for all those newsletters, and I've found that calming. I actually read the curated list of newsletters I've signed up to now, once a week or so in a magazine-like stream without the dozen buttons required for a letter-like email.<p>The 'reply later' feature allows me to put aside a few emails over a couple of days, then click the 'focus and reply' button and those emails come up in a clean list with a stripped-back interface which moves on to the next email in the stack.<p>Despite the on-trend aesthetics, this is a thoughtful piece of design, which I moved to for the above reasons and is delivering on.<p>The support has also been excellent. I submitted a feature request, they got back personally quickly, and then a couple of months followed a personable (possibly automated) email saying the feature I'd requested was now live. (Notion is also in the habit of attending to its users like this).<p>All email clients are garbage-out if we keep putting garbage in, but as a person looking for a more calming space to manage the deluge, I would say the above review is limited in scope in understanding what Hey is designed for. Why build another email client if it doesn't make some opinionated moves contrary to the state of the art?