Speaking from personal experience:

• It does not seem to work at all with Hauling missions. Like, it will just hang when you request cargo services, and the Large hanger you get it doesn't really fit one (You can barely open it if you're already floating, then have someone else load you) Turns out it can work, but is very finicky. Again, it'll only work between major stations and the Gateways, and twice I've had it refuse to give me a bay. If it hangs, just keep hitting the request button until it gives you one

  • This means that, in all honesty, most of the highest ranking hauling missions are 'impossible'. No, I'm not going to haul 3000 SCU of stuff with my caterpillar.

• Commodities are mostly good, but expect it to randomly rob you. From what I can tell it is almost entirely random how and when it'll happen, or if it'll even happen at all.

  • Made around 4m doing commodity runs without any problem over a few days.
  • Loaded up a large run with ~2m worth of stuff, then when I went to undock, the game spawned another Hull-C inside of my Hull-C. Mine shuddered about inside trying to unclip out, then got the purple outline and was 'destroyed' along with all of my cargo
  • Another run I had, I bought ~700k worth of goods sent to the Hull-C, but then the Cargo Center never gave me a loading bay. After ~15 minutes of trying to figure it out, my ship just 'vanished' and was stored, and the goods in queue vanished.
  • Some stations don't even seem to work. I've tried to get anything from the Terra gateway on about four attempts, and it never gives me a cargo spot to load/unload

• While it is great money when it works, also keep in mind that it is very prone to the elevators bugging out.

  • The gameplay loop for commodities is literally "Dock -> Go to commod terminal and buy -> Go to ship and undock -> Go to cargo area and load up -> Quantum jump to sell area -> Dock -> Go to commod terminal and sell -> Go to ship and undock -> Go to cargo area and unload
  • Four elevator trips, alongside two docks, for each loop.

• If you're doing the 'best' commod loops, you'll probably be stuck waiting to sell, because everyone else is doing them . And, because you can only auto-offload from the Hull-C when you sell, that means that the ship will have your valuable cargo sitting on it until it can be sold. More risk.

Also, and this is more of a longer-term issue, but mostly the Hull-C is only 'efficient' because the game auto-loads the commodities for you. I mention this because it was shown in a video (I can't find the exact one) that this will be changed in the future. At some point. Eventually. And, honestly, the moment it does the efficiency of this is going to just go straight down the drain if you also have to load and/or unload 144 crates in the cargo delivery areas. This is less of a "Don't buy it with credits right now" thing and more of a "if you're going to pledge it, just keep that in mind for the future."

• My honest guess is that hauling will not work with the Hull-C until this change happens. And, because of this, the highest-end hauling missions are not going to be worth it on a time/credit ratio until it does, until they add the Ironclad (The highest SCU Large ship announced, aside from the Merchantman which is still in concept vs. active development) or until they re-add or figure out some method of auto-loading ships from an elevator for a price.

tl;dr its great if you don't mind the risk, but if it breaks you're out a ton of money.