Struggling? He'd written a lot of stuff before Spice World. And after it, he did all that S Club 7 crap. As IMDb puts it:
Two of the films he's written, Spice World (1997) and From Justin to Kelly (2003), have gone on to receive nominations at the Razzie Awards for Worst Picture, Worst Actress, Worst Screnplay (For Fuller himself) and Worst Screen Couple, (among others). Also, both films were nominated at the 25th Annual Razzie Awards for "Worst 'Musical' of Our First 25 Years".
Sounds like it'll be quality!