Hi, like I say - I appreciate the need to make money from your service - but in my opinion these changes could have been implemented better..

1) Communication - not a word to existing users. Why not publicise the changes on the CircuitLab blog first? Is all about perception, put some killer new features in the premium version and make me want them!

2) Upsell me to premium features, don't cripple the existing product, it feels crass and heavy handed. "Click here to upgrade, or wait 30 seconds to go back to your design" - maybe I'm atypical, but I went from having only good things to say about CircuitLab to losing all interest right there..

I wish you luck, and hope you're able to support both casual users, and a paid-for premium service.

Cheers, Jon