The feel is good. Not quite as good as fresh VS850, but you can certainly tell it is part of the VS850 family. It's a slightly harder string than VS850 and the shuttle doesn't stay on the string bed quite as long as its sibling but it is not an instant rebound like BG80.
I'm not a fan of the hard BG80 personally, I prefer a string that gives a medium hardness feel and I think VS890 fits nicely in that category. It's probably a fraction harder than my current favourite NBG99.
Tension hold has been good so far, I've not noticed any drop in tension over the two hours but I'll reserve judgement on this until I've played another session or two.