I have only had this a couple of weeks but I am impressed. I came from a 3 year old DS1512, which I will move off site and use as a backup. Initially, I upgraded to a new DS1517+, but saw no increase in CPU speed. I returned the DS1517+ and "downgraded" to this 918+, gave up a bay, but am enjoying great plex encoding times. I just got 2 of these inexpensive 8GB Ram modules to work https://www.amazon.com/gp/product/B01979WD4U/ref=oh_aui_search_detailpage?ie=UTF8&psc=1 The DS918+ now recognizes the full 16GB. Time for some VMM experimentation. I remain a big Synology fan.