They are looking good. It's hard to say on how many days left, each plant is different. Try to grab a jewelers loupe off amazon.. Maybe 10-20. You'll have to look at the trichomes and see what color they are. There's clear, cloudy and amber. Some people wait until there's 10% amber, others might wait for 50% amber. I personally take them when I start seeing hints of the amber trichomes. When they change color from cloudy to amber, this is actually the degradation of THC. You can grow 3 clones (genetically identical) and take them at different times. They will each have a slightly different taste and effect. There's a spectrum for taking plants, call it a window of 14 days. The better you get at it, the smaller that window will become.