Let me preface this with that I am an experienced CLI user and with Docker, so this really is not in my interest generally, but getting older and dealing with a variety of other personal issues, having a nice dashboard to deploy things sometimes is just really nice ya know? So I figured I would put on my dusty beginner's hat to get this a run.
For the beginner, it's a nice system to get started and get your feet wet with a no-nonsense app install experience. I tested this in a VM on my desktop and installed Sonarr and Sabnzbd which if you use Docker with these, you know the proper volume mapping is key. They take the hassle out of doing this for the end user. With that said though - file permissions are a bit off and both Sonarr and Sabnzbd needed the proper permissions set for the folders. Not a deal breaker for someone accustomed to the CLI, but for a new self hoster, this can be a bit frustrating.
Their app store is pretty impressive and I guess growing, the install on the server was painless to get running. It's something to keep an eye on, it's in good company with the other ones like Umbel and CasaOS, each has their own qualities.
For those wanting more fine grained control over the apps and installs, Tipi is a bit more opinionated to the port numbers and paths used and you can't easily modify those (at least from what I could tell). In the long run, this is a non issue for the most part if you are starting on a freshly installed server and don't want to handle the challenges of proper path mapping, reverse proxying and so forth. (They include Traefik in the install). Not having to worry if port 3000 is already taken or 8080 is, you can trust that it will handle it and it does!