I love this developer. It's been my preferred liquid for about 4-5 years now. But, just out of habit most likely, after a couple of days of printing, I just toss it, and mix it fresh. Or even fresh for each session. I learned a long time ago, there's no need to be frugal when it comes to investing in the time/paper spent printing for hours on end, by re-using developer.
Also, I use both Fotokemika, and Foma fiber papers (love Foma 542), with it, and they always come out beautiful.