I have been using slinkys for a number of years now on a semi-pro basis. I have never had a bad experience with them.
Packaging is always intact on delivery, the strings themselves are fairly bright and zingy to start with, but they soon mellow and keep a good tone for many, many hours playing before finally dropping off. The feel is good, not too slick, but definitely not as rough as some roundwound brands (Rotosound, I'm looking at you!)
Tuning stability is superb if you stretch the strings and bend them properly over the saddles when fitting. In fact, I only have to retune for the first hour of playing fresh strings, after which they'll stay stable gig after gig, night after night...even when using a de-tuner.
This gauge is particularly good for those basses which have weaker output on the d and g strings, or for players who want a higher tension on the upper strings.
Strings always go dead too soon, whatever the brand. I find the price and quality of slinkys is hard to beat when changing them about once a month.