It works really well when it comes to guzzling tabs and storing them as lists instead of processes that hog resources on your system. It is useful, and easy to use, and I still plan on using it.

I like that you can send tabs to 'Named tab groups'; but I dislike being unable to reorder them (and they show up in the order they were created and named in the menu, so they're unsorted if you have a lot of groups).

There is one issue I've run into: if you've recently named a tab group, and then send an individual tab to OneTab, it'll be sent to that tab group and not to a new unnamed group. The only way I've found to get around this issue is to send multiple tabs (e.g. 'send all tabs to the left' or 'send all tabs to the right' to OneTab) so that you get a new unnamed group. A bit unintuitive, and not documented AFAIG (As Far As I Googled).

Overall, pretty good.