If you're looking for something different...
String quartet player here.
I was looking for something different for my modern cello (I need a change of sound now and then) and thought I'd give these a go.
So.
They have all the benefits and drawbacks of lower tension strings. Lucky me that my cello apparently loves low tension (whereas a previous cello loved high tension); much more resonant & open, much more sound. And in string quartet the name of the game is response response response to match the immediate starts of the upper strings (especially in ppp), and these strings are FAST. Articulation and clarity is simply the easiest to achieve ever in my playing career, and ensemble is better. There is tons of focus and density if you need it, and any color you want.
The bow technique is different, particularly in the upper positions. The strings are much more likely to squawk if your bow placement, speed and weight isn't just so. These strings can take a heavy bow but you can often get even more by letting the string breathe under the bow.
Intonation is also more sensitive to the bow (pitch can go flat if the bow is too close to the fingerboard or too slow, can go sharp if really heavy). The lower tension is much easier on your callouses.
I would strongly advise against mixing these with "normal" strings (like a typical Larsen/Spirocore combination). Fifths and double stops react very differently between these and normal strings and my cello was basically unplayable until I went all-Warchal.
Yes they need four days to hold their pitch more than 30 seconds so seriously...plan ahead, there's no getting around it. Keep your old stretched-out set as your traveling spare. Oddly though the cello is always tuned exactly where I left it...my tuner basically just gives me a thumbs up no matter the location or the weather.
Long review, but these strings have been great to me and I'm ordering my second set after 18 months on the first set. As long as you have an open mind and are willing to adapt, hopefully you'll have as good a time as I did!