I tried the reactive MTA 3 and had no sync.
Sometimes players teleported into vehicles but other than that I was under water the remote end, or at least my nametag was.
I had issues in LU but they were nothing like that I only had vehicle issues before with streaming in LU which might be fixed now.
Never in my life have I seen such a terrible multiplayer (MTA).
GTA 3 has like 4 multiplayers:
GGM (uses civilian peds for remote players, never crashes)
MTA (no sync)
LU (much better than those 2)
GTA3C (LINK REMOVED)