Had a fantastic 25+ mile ride this afternoon after a Saturday and Sunday filled with rain and chilly temps. The rides feel so much better with the new bottom bracket and chainrings. Pedaling is nice and smooth since the BB isn't grinding and creating more friction anymore. Shifting is much nicer and more accurate since the chainrings are no longer bent and wobbling. Most hill climbs now don't seem as grueling either. I think the next upgrades will be the rear cassette (11-30T vs current 12-25T) and freehub. Sticking with the 2x8 drivetrain for a while though. May be quite a while before I can afford to move up to a 2x11 Ultegra groupset.