I actually used Trails End on scent wicks hanging in tree limbs and nailed a nice eight point. I learned a couple of years ago how to use them, effectively. Drag line and mock scrapes.
IMO, estrous works better on private land than it does public. It's most effective right before the rut when bucks are searching out that first doe. Most guys use too much, less is def more. AGREED
It lingeres, and bucks ain't stupid
Ive had great success making scrapes below a nice licking branch and then peeing in it. Had one last year go from a 2'x2' to a 6'x6' within two days.
Ive used just about every brand of estrous there is, including VS-1. I had a mature 8 come right into VS-1 once, and a slammer 10 come into Tinks Golden Estrous once. Outside of that, I have not had much luck with estrous.
Save your money, find where bucks cruise during the rut, and rely on your woodsmanship/hunting skills to get you within range of that buck you're after. EVEN THOUGH THEY ARE DISTRACTED DURING THE RUT, IT PAYS TO DISTRACT THEM EVEN MORE.