A few important reasons to not buy Galaxy S5:
- because in a few months will be released Samsung Galaxy Note 4 (it's expected that this smartphone/phablet to bring very impressive hardware and software inovations);
- if you're not satisfied by it's hardware specs, then take a look to Samsung Galaxy S5 Prime's superior hardware improvements (it will amaze you);
- because many software (and hardware) technologies still have a lot of bugs.
But if these issues aren't a problem for you, then you can buy and enjoy by Galaxy S5 (at prices starting from $99).