Once you get used to navigating all the options, it is very convenient. The developer responds quickly. I had a problem on the main subscription page. Filters at the top of the main subscription page may have issues that are limited how YouTube provides data(slow load or repainting) when filtering on channels/groups that don't have many recent videos. The workaround for me was to leave the upper filter set to "All" (under "Show Filter" icon) and use the PocketTube left nav to filter by group/channel. If possible, I would suggest PocketTube display a warning instead of continuing to attempt to load videos.