Nothing wrong with that. Much better than the person with the habit of never using them, or the one that really gets me, using them as they are making the turn, not turning them on 50 or 100 yards before the turn.
Or the opposite.
Around here we have turn lanes in the middle of the street. Too often, while in the left lane, someone will put on their left turn signal, almost come to a complete stop, while slowly (and I mean slowly) creeping into the turn lane, only fully being in it when they have to actually make the turn. Meanwhile, all the cars behind them are slowed to a crawl while the turn lane remains wide open...
Then we have the jokers in the right lane, who, on noticing a car slowing down in the left lane to take the above stated left turn, will slow down to match the speed of that guy turning left! I guess it’s instinctual, as they don’t want to get caught overtaking in the right lane, which used to be illegal.