These drop-tuning Strings are great for low tunings, I personally use them for Drop C and Drop B on my 24,75" scale guitars and they are perfect for it. The strings are perfectly tight and no slacking to be found or heard.
They keep in tune very well (as long as your hardware isn't messing up of course.)
The lowest String is pretty thick (60 gauge) so there might be the need to widen the gap in the nut a little bit on something like a Strat or Tele, but it's nothing a file can't handle.
Also, they last a pretty long time without corroding or starting to lose tone in a major way, so if not played too much they easily last 1-2 months.
It's just a very nice set of Strings and they are just as good as described.