I'd be curious to know why the download is enormous. I know it seems like a trivial matter but when other single-purpose productivity tools come in at 20MB, I wonder what this one is doing.
"There" as a new app is nice to look at and really helped me almost immediately to have an overview of the team I'm part of, which is partly based in the US and partly in the UK. It's easy to lose track of who lives where and what their local time is, but a simple address-book-like app as There can really improve how I can collaborate and work with them.
Working with a distributed team and with friends/family across multiple continents, There is a super simple way to see who's awake and who (should be) fast asleep. Design is super tidy. Hats off.