Pros:
Water changes are super easy
Cons:
A lot of nuisance algae has to be removed by hand
I have a 7.5 gal, which is a cubic foot. Mine is a little overbuilt with a skimmer, ATO, and oversized lighting. The super small tank has been really good to me. My tank journal is way out of date (update soon!), but I've had it over two years and I've had a lot of success.
Some things depend on how often you want to mess with it. IMO, a skimmer and ATO can help there.
I don't have a lid and honestly can't imagine having a tank like this without an ATO. The evaporation rate is pretty high.
A skimmer might not be necessary for softies, but in my case, I think it's been the secret sauce to keeping acros and other "difficult" corals. FWIW, I have more trouble with LPS in my tank than zoas and SPS.
I don't have any fish, just a blood shrimp, some snails, and a tuxedo urchin - the only actually useful creature in the tank, highly recommend.
Design-wise, I would say, don't put too much rock in. You have to clean the tank (no tangs, etc.), so you need to be able to reach into every part. It seems easy in principle, but the tradeoff is more rock, more corals...
For maintenance, I buy saltwater - skipping that whole fun process and its equipment - and I have a battery-powered submersible pump. A 20% water change takes less than 5 minutes. Scrub out the skimmer cup a couple times a week. Razor the glass every few days. Feed pellets to the shrimp everyday if I can/remember or else a few times a week. Consistency of the inputs could be important, its why things like pellets are better than frozen foods, IMO. I pull algae with a variety of tweezers and small trimming scissors before a water change maybe once a month, depending on if its going on a hot streak or not. Sometimes the algae seems unstoppable and other times it's very minor for months.
Having it on the desk does seem like a distraction. There's also the issue of having a bright light at eye-level. Maybe someone who has actually done this can chime in.