I do have some small complaints. Nothing is perfect after all. I have emailed the developer, Adriaan though, and these things will be changed in the next version, or are things that are being considered for a future version.
In Kung-Log and in the Ecto betas the blog selecting was done with a drop down menu, so it was clear as to what blog you have selected. In the Ecto final it is now a button in the toolbar, and you get a submenu to select the active blog. I like this better, but now there is no way to know what blog is the active one. Sure you could look at the categories, but what if you are posting to the same blog from multiple users. It no longer says anywhere in the UI what the active blog is. Ecto 1.0.1 will have current account and blog name in the title bar.
Another thing that was changed right before the final release was the status for "publish" and "draft" in the Entries and Drafts window. It was just text before, but now there are status is denoted by icons. I don't think the black and white icons are different enough, and I suggested different colors, such as green and red, or green and orange. I hope this is considered.
Those two things are small potatoes though. My largest beef with the app is selecting a primary, and then secondary categories. This is not as important on my site, but it is very important what posting to BlogCritics. There is no way to select a primary category, and the secondary category(s). No outright way, that is. I found out how the primary category is set, and that Adriaan is looking for a better way to handle setting the primary category.
To set the primary category: From the checked categories, make the primary category the selected category (i.e. select that row). Thanks for that info Adriaan! It sure is annoying to have to switch primary and secondary categories in the MT admin, and now I know. I hope a better solution is implemented soon.