There's some seriously good games in the bundle! World of goo is ridiculously good quality - its exactly like the PC version.
Aye, Eufloria is probably the better game. That said, they've very little in common Eufloria just has more direction, story and thinking involved I think. I'm unsure what the "point" of winning osmos is, if any and I usually do so on the harder levels by luck not skill.
True! I made the mistake of buying the non HD version of Osmos which annoyed me as I don't tend to use my iPhone for games now I have the iPad... It's fun but I'm not buying it again.
Get the humble bundle? The other two games are alright, and will definitely kill you a few hours. You can also get world of goo if you donate over like £3.50 or something. HD Osmos and a few other fun games with it!