If you are with them, you would no doubt have received and been disgusted with their price increase from 4.8c per MJ (first 27 per day) to 7c per MJ (first 27 per day). Essentially a 33% increase, which seems so high, it's like they want out of the SA gas market and trying to purge all their customers.
If you are with another provider and shopping around as a result of receiving your price increase letter, stay well away from Covau if you are in SA and are attracted to the low rates you see now.
I will be waiting until just after July, shopping around and getting on the cheapest deal I can find for our usage habits.
If the Greens ever win SA they will amend the Gas Act to ban new connections. Gas is on the way out, unless you believe the hydrogen trials will go anywhere.