Rated 4 out of 5 stars
I've been using this for years, and it's been pretty good. The interface has remained a wee bit conservative, but quite functional.
Unfortunately it doesn't work under Quantum any more. Please port it to the new system. It's one of the very few things I'm missing from pre-Quantum times (Flym on my smartphone will do as a replacement for now).
I just made a donation to Andrey to this effect, but the PayPal form had me choose the amount myself. It would be nice if some sort of an estimate was made to tell us how much more money would be useful in order to get this work done.
Rated 5 out of 5 stars
I've been using this for years now, and I have no intention to switching to anything else. I was drawn to it by the very clean interface, perhaps a tad too rectangular for today's standards, but supremely useful nonetheless.
The lack of an automated sync option is a bit of a nuisance, but easily fixed by occasionally exporting the OPML file and putting it up on a private website and importing from there in other Firefoxes.