I use one since 2011 and bought a few more for the spare parts because I plan to use n950 for several more years as there is no better phone in the foreseeable future and no spare parts anywhere for sale.
To be honest I've killed my first phone already (broke the LCD) and transferred the motherboard to a new one to not to spend time reflashing/rooting/installing apps/transferring data/etc. But the flash chips are too old already and I see lots of "ECC corrected" errors in dmesg so I'm afraid I will have to go for it in the next months with the next n950