My review is based off what I see at the 2 most important qualities:
1) Ability to generate good looking art
2) Ability to interpret the prompt
This tool does a good job with quality #1. I'm not blown away, but it works as good as (or maybe even better than) I would hope from a relatively low-cost AI image generator.
As of this writing, it doesn't do so well with #2. I've tried more than half a dozen times to get it produce the iconic medical emblem of two serpents wrapped around a staff. I've tried several prompts and even tried uploading a similar image. The one that looked half way decent was zoomed in way too far. There's just not much ability to control the output. You get lucky, or in my case you don't. With that said, I do plan on sticking around in case the service improves over time. I suspect it will.