OK, We all know the claims, the glossy ads in landscape magazines & the reps pushing a particular product, but-..............Which slow release Nitrogen product has lasted the longest in your experience? Over the years I've tried SCU, PSCU, MESA, MU, UFLEXX, XCU. My experience with Mesa is limited to the end of this season, but with the others none really has stood out as hands above the rest MESA claims long term release w/ less of a flush of growth, but having applied it in the early Fall, it was hard to tell if that is the case or not... I used UFLEXX a few years ago and it was disasterous-The granular UFLEXX fert blend would "melt" in the humidity & heat of June, then clog up the spreader & start coming out uneven I'm always sure there is a better product out there-but cutting through the hype is always tough. Any experiences/suggestions?