You should post a simple guided tour like how Yahoo does for their first time E-mail users or how google does for the new compose button. The app itself is excellent and your target audience I believe is not everyone, but specific web-designers with HTML+CSS knowledge - So you should try to make that clear. Right now, it looks as if it's meant for everyone and hence the "too complex" complaints. I'd give this a 5-star rating. I'm a designer myself and this would save me tons of time.