I use the Vallejo ones together with those from Army Painter, and they're both serving me well.
One thing I did run into with some of the older Vallejo washes is that when diluted with water, they would cloud over whitish when dry. But then they came out with a new formula and the problem was gone.
I had this especially with their black and green washes; the browns did not have this issue at all.
I also use their slightly larger bottles with flip top, and those are some great washes for terrain pieces or as base coats when painting with glazes and washes.
And then of course there are the large pots with screw on lids. I only have the black and sepia/brown ones, but I use those exclusively for bases and terrain. Doing an entire 4x6 table did put quite a dent into my first jar of sepia, but I was lucky enough to score a second one at Crisis 2019, so I'll be good for a bit longer

So yeah; Vallejo washes are pretty good in my experience and I use them a lot, but to be honest, I use my Army Painter Strong Tone the most these days.