Well, I wanted to try a light-top heavy-bottom set instead of a 0.011-0.049 set. I ordered this set and RotoSound RH10 to compare. My test guitar was a Fender Jaguar, an offset guitar with vintage tremolo and a short scale neck. So, keep in mind that the tension I get is lower than one would get on a standard scale.
To say the last thing first; they (LaBella vs. RotoSound) are very similar to each other, though I think La Bella strings last longer and keep the tone as new strings longer than Rotosound set. They both come in a sealed package, but the roto package had a tear, so this aging difference might be just due to that defect on my specific set.
Other than the tone and the aging, I can say they stay in tune very well, bending them is a lot of fun and they create enough tension on the floating bridge (it is a mustang bridge) of my jag. Not sure if this joy comes from the short scale action, but I am excited to put this ones on my other guitars as well - after trying another RotoSound set and maybe one from Daddario.
I can already say LaBella strings as good as any popular uncoated nickel plated steel strings, if not better than some. Their quality control seems to be very good, play feel is great and they don't turn to rust as fast as (let's say) a slinky. Probably, thanks to the tightly sealed air-free packaging which they do better than others in my opinion.
If you haven't tried a LaBella Bender string set, I strongly suggest you to check it out!