In total honesty, most reviewers here are right: this set is a little bit unbalanced (something not uncommon with 8 string sets of any brand) and "long lasting" is not something that you could use in the same sentence with Daddario. BUT...
Having said that, Daddario could be regarded as a premium brand overall. You can easily see that in their packaging, for example (on the flipside, you will pay for that, rest assured), the broad choices and the diversity of the different lines offered by the brand.
The XL line is not their finest offering in terms of quality (they have much better), but there still get the job done.
I was somehow forced to choose these in order to gain better fitment for one of my 8 string guitars, so I can compare this set with a different brand (two others in two other 8 string guitars). I can therefore attest that durability is not a strength for the set (in few weeks they were visibly tarnished), but still sound consistent and nice (just not fresh). It was not cheap and are still going, but I can imagine that these might not be your cup of tea. I will not change these until they die and at that time I will probably select another brand.