The GPS in the ZTE V987 works really great. I have only used if for turn-by-turn navigation once, but that worked gread.
The first GPS lock was done in 24 seconds - and that is fast. After that I seem to get a lock in between 5 - 20 seconds. Pretty good.
The test was done with EPO Assistance and AGPS on. Do remember to turn them on for a fast lock.
How to turn on EPO and AGPS
Go under System Settings -> Location access
Make sure to tick bothe GPS EPO assistance and A-GPS. Enter EPO settings and activate "Auto Download"