Do not love. I used opus on api billing for some time before the new larger plans came out, so I switched. I routinely hit the opus limits in an hour or two ($100 plan). There are some tasks sonnet is good with but for many it’s worse, and sometimes subtly so.

Upshot - I will probably go back to api billing and cancel. For my use cases (once or twice a week coding binges) it’s probably cheaper and definitely less frustrating.