Rated 4 out of 5 stars
I've been a long time user, and tree style tab keeps getting better and better.
However, the last few versions have some problems with the 'auto-hide' feature. I have the tree displayed on the left column, with auto-hide switched on.
What's happening is that when I close a tab (Ctrl-W), the tab window keeps popping up and won't go away unless I click somewhere on the current tab window (I have tried turning off the 'pop-up when closing tab' feature, but no difference).
Also, another problem is sometimes when the tree window is unhidden (if I press Cntrl key or move the cursor near the edge), it causes the current tab to resize by moving the right-hand scroll bar inwards (so overall the display gets narrower and text gets reflowed). It doesn't do this every time though.
Lastly, I think you should add a bug reporting option, as there doesn't seem to be any way to report problems to you, except in these reviews.