+++ Pluses +++
Very convenient to have a desktop client like this. If you like the UI in the official Twitter client, then this app will appeal to you. You can conveniently just put the feed to the side of your desktop, and not have to worry about it taking up all the screen real estate.
Performance is great! Nice to be able to quickly scroll through your feed.
--- Minuses ---
The only negative thing that I noticed right off is that you have to hover your mousepointer over the photos to see the description, and when the description does appear its truncated with ellipses.
Unfortunately, in my opinion, the description is the other half of the post to Instagram and, if its not there, then Im missing half of the information about the post. If I have to exert effort to see it, then it just gets irritating after a while.
Therefore, just as in the official iOS app, I want to see beneath the photo or at least toggle visibility of:
1. The description <-- VERY important.
2. List of usernames who liked the photo (up to 10 or so, then just the number)
3. List of comments.
It makes sense for the "Like" and "Comment" buttons to become visible when I mouse over a given post, since at that point, I want to take action on it. Otherwise, I would prefer to just scroll through and scan the photo/description/likes list/comments without having to take any extra action on it.
Summary
In general, I would recommend this app since it feels familiar, and Im sure after using it a while most of the negative aspects will be just something I adjust to in this version.
I looked around for a preference or an option to show the description/likes/comments directly in the feed itself but could not find it, so if its there, then I apologize. If these options are not present, it would be awesome to have them be toggle-able, and I would totally bump this up to a five-star rating at that point. But today, its gotta be four.