
Princeton University Science Olympiad:
My team has attended this invitational since its conception, and we've attended each subsequent iteration with little to no complaints each year. It brings exactly what it promises to bring and we love that registration fees are waived! It might not have the best teams each year or some bells/whistles that other invitationals have, but thank you so much to the amazing Board that brings together a smoothly run invitational and keeps us competitors happy. Special shoutout to Bernard who ran Boomilever this year and Unome who ran Geomapping this year. I truly think this is the best invitational out there since it delivers each time with no complaints from teams. Also Opus 21 was amazing

MIT Science Olympiad: We've attended this invitational twice in the past two years and it's always been hyped as Nationals 2.0. However, I feel that its confusing campus layout lends itself to much confusion. Most events run well with competent ES. Small complaints here and there, but nothing too major. Some mishaps do occur like with Game On and a really awkward though fun to read Fermi test. Tests, however, do generally follow Nationals quite well and the keynote speaker usually has some interesting stuff to say.
Science Olympiad at the University of Pennsylvania: I have the most issues with this invitational, stemming from each year and just mishandling of events at times. Codebusters and Wright Stuff were my biggest gripes this year although past years have had issues with awards timing and poor test quality and mismanagement of rooms for station events especially (Rocks and Minerals was atrocious last year). All in all, just not as well run as the other two mentioned before and this year was only made worth it due to the strength of teams attending.
Cornell University Science Olympiad: Generally good time at Cornell. Nothing amazing but nothing terrible. The awards ceremony was always nice since their amazing drum group performed! Did not attend this year but hope it was still there. Events ran normally and ES's were generally nice and wrote decent tests.
Overall: I would place my rankings for each invitational as Princeton, MIT, Cornell, SOUP. Unfortunately, we were not able to attend other notable invitationals (GGSO especially) but I hope other posts below can comment on the invitationals I missed and build upon my thoughts! Also hope the boards of all invitationals can read this thread to improve next year's competitions!
*Note: Each of these are my own opinions and do not represent anything other than that: my own opinions.