First of all i am by no means an expert on strings .....as i have tried not many besides the EJ16's. Never had to.
But that said.......i have never had one broken on me while playing. Even though i bend strings regularly.
As it comes to tuning i am a real tuning freak, before playing i tune each string to the exact by using a digital tuner. And re-check regularly during practice.
Most of the time the strings stay in tune for 2 days straight, i guess this also depends on the guitar but still a lot has to do with the quality of the strings.
I have very acidic sweat....and after every couple of weeks these strings tend to loose its shine. After 4 weeks, the tone yet in tune becomes a little dull, and i have
to replace them with new ones.
After restringing the strings, it usually take an hour of playing for them to settle....and after a day of being on the guitar they keep consistently in tune with only minor fluctuations (halfway a half step max).
Buying them in these 10 packs...seems to be the cheapest deal. And i like the idea of having enough packs in reserve....to never run out of them.