It was OK. It's a new to me 2015 MBP 11,4 & the battery is in much better condition than the other two 2014 MBPs that I have. I was getting about 3 hours use in general email & web browsing. I was using ssdpmEnabler.How has your battery life been with the Sabrent Rocket?
I have now swapped out the Sabrent Rocket for a 2TB Apple Polaris SSD that I was using in one of the 2014 MBPs. The peak performance of the Polaris isn't as high as the Sabrent Rocket but the write performance is sustained at around 2200MB/s & read performance is sustained at around 2500MB/s. The Sabrent Rocket peaked at about 2600MB/s but write performance dropped down to about 1200MB/s after 5-6 runs of Black Magic Disk Speed Test. It makes a big difference to use the Polaris in the 2015 MBP as in the 2014 MBP read & write performance was literally about half what I now get.