I use these on a Gibson 175 and the gauge is pretty much perfect for me on this instrument. I've used D'addario strings on quite a few other instruments and always found them dependable. In this case I particularly like the balance of the lower strings - in some other sets of this gauge the D and A strings can be a little light, relatively speaking. With these, there's no such issue.
These are of course a little brighter than pure nickel strings, but that's not a bad thing. When you first put them on, to my ears they are a little over bright but very quickly settle down as the string plays in. They don't seem to go dull as quickly as pure nickel strings either. With good care and cleaning after each session these strings are very durable and keep their intonation for a long time.
Sealed packaging is good, which allows you to buy in bulk and receive a discount. Even without this, these are attractively priced strings, and the quality is dependable, something that can't always be said for some other well known brands.