Sure! I started off using the Termius app for ssh, but ended up moving to Blink. It's been so long that I can't really say why I stopped using Termius, but Blink works really well. It has a lot of built-in bash commands, but honestly I don't find those that useful since I'm not working on local files. I think if Blink had vim built-in I'd use those commands a lot more, but right now I just open Blink and immediately ssh into my home machine. I have a couple ssh aliases set up for that -- one that uses my local network if I'm at home, and one that connects to my home IP address if I'm out on the road.
The only special setup that I had to do on my Mac was allowing ssh connections and adding the public key that the Blink app created for me. When I was on Windows I found that I had to map the command and option keys from my iPad keyboard to my custom vim keybindings, but now that I use a Mac as well that's not necessary.
Another vote for Blink. In particular, its mosh support is brilliant.
Short version: after installing mosh-server on the remote machine, you run "mosh remotehost" instead of "ssh remotehost". It uses SSH to establish an encrypted UDP "connection" to the server. If your IP changes, Blink instantly re-establishes a connection. If you pause your iPad for a week and come back to it, Blink instantly re-establishes a connection.
What this means in practice is that I can start doing something at home. Oops, time to leave: I take my iPad on with me on the bus to the office, pair it with my phone, and continue working from the same session. Get to work and switch to Wi-Fi, and I keep using that same session. It's freaking magical.
mosh + tmux/screen is a wonderful UX. The lack of an escape key is less critical on a command line, where C-c more reliably does the same thing (and if you're using vim, try C-[ or remapping the action to `jj` instead of Esc).
If I'm on my home network the latency is impossible to notice, I might as well be at my Mac. Same goes for bash completion, it works flawlessly. Once I'm off my home network it's a slightly different story, it just depends on the internet connection wherever I happen to be connecting from. For example I stayed at a hotel in Fargo, ND a few weeks ago and the latency was fine for the most part, but there were moments where the typing or completion would lag behind by a second or two and then catch up. Almost like lag in a video game.
Blink has mosh in addition to ssh, which if I understand correctly is much better suited to handling higher latency connections like that. I just haven't taken the time to set it up at home, so I can't really say how it performs.
All in all, if you're curious about using the iPad for this kind of thing I really recommend it. I absolutely love mine. Apple is pretty generous with their return policy too, I've returned a handful of their laptops just because I had buyer's remorse!
