Used WeatherBug for the longest time... was OK but a horrible memory leak.
Bit the bullet and bought BerryWeather (had a discount coupon) and It's ok... best GUI out there for any weather app... could be smoother though... and I believe it leaks a bit of memory as well... can't confirm though.
I've only used Weatherbug, BBWeather and now BerryWeather, and BerryWeather has the best displays and the most flexibility on how you want things displayed.....worth the $$ IMO.
BBWeather here. I could never get weatherbug to work correctly. Either the colors were off, or it couldn't pick up my location. Every time I started it was different.
I used BB Weather...had WB but decided to try this one...no major issues...sometimes WB got annoying because I would get weather alerts for things like dry conditions/high winds, couldve turned it off...but idk...tried the 3 day trial of Berry Weather and liked it. May bite the bellet and buy it...