I have and like the app, using it now ;)

It allows me to sneak a peak at steemit throughout the day while at work. It has several features I wish steemit had, like scheduling and bookmarks as examples.

It does crash a fair amount and locks up on me often and I find myself force closing quite a bit. It crashed on me yesterday when I was upvoting a post before I could resteem or otherwise mark it to find it again. Luckily I found it again, but almost lost it there.

But I am grateful for it and look forward to improvements over time!