I have been a fan of Elixir strings for about 4 years now. They are easy to play and sound very well balanced. Elixirs coated nickelwounds sound "set in" right out of the box and keep that tone for months. The only thing these strings could not pull off was a bright, punchy slapping-tone. And this is where this set of stainless steel Elixirs can really shine!
I put them on my 5-string fretless first and was amazed with the brilliance and vocal qualities of these strings. The notes sounded clearer but were lacking just a bit of "body" in comparison to the nickel-version of this coated string. You could hear the subtle differences on long, sustaining notes and especially harmonics. I personally prefer the nickelwounds on my fretless.
A few days later I put the stainless steel Elixirs on on my 1995 Warwick Fortress and they turned out to be a perfect match: Clear lows, growling mids, snappy attack and a brilliant top-end. I could not put this bass down for hours...
I have been using these strings for a few months now and their sound has not changed yet and the coating is still like new. They are more expensive initially but make up for it on the long run. I only need to change these maybe twice a year and I play about an hour daily. Highly recommended!