Steve RUnge's High definition commentary on Philippians not only wouldn't download on to the Logos iPad app, but, when I accidentally opened it online it froze the app for some time.
Also have download problems with Lion Handbooks and various other series on iPad app.
I don't have the latest iPad running system and am not likely to be able to download it in the near future - half a gig would take 4 hours to download at church, even if the internet connection didn't cut out during that period! This is not Logos' fault, but explains why I need to cope without an iPad update for the foreseeable future....