it was pretty crowded, BUT we didn't get there til around 1pm they ran out of lockers right when we were at front of line so luckily we were next to get one as soon as someone returned a key which was like 2 min later.
we got the passes free w purchase of universal tix so we tried it out.... it has alot of bigger slides, which was good, my kids are 17 and almost 14 and they were alittle disappointed w TL and BB at Disney bc there we not many bigger slides/rides.
If it were closer to my house I'd pay to just go to WnW in other words! It was a nice break after all the power walking\riding\planning I did for Disney to just go hang out and ride a few rides at a much slower pace at WnW before we go to universal and IOA...if you have time it's worth taking up the offer on that free day! I just wish I'd know you get FOTL passes all day on all rides if you stay at the right hotel LOL cause that sounds so much better than waiting in long lines, BUT we just we at Disney for 1st trip 7-27 thru 8-1 and the lines were NOT bad at all only things we really HAD to use FP for were EE, Soarin', Space n Splash Mtn., Safari, and definatly RR, didn't do TT cause it was down due to tech diff, then it rained...then line was 70 min and FP return was after time frame we were planning to be in park. The other rides were like 10-20 min wait 30 at most! except TSM was 230 min... rediculous! but my kids r older so they weren't just dying to ride that anyways.
have fun!