I sent in 21 reels of 1959-1963 (60 year old) 8mm home movies. I had them scanned at 1080p resolution with grain reduction. My later father had some of the reels scanned from an unknown local service, so that's what I'm comparing it to.
First, even with delays from COVID, the turn-around time was more than acceptable and faster than predicted. Really regret not doing it sooner.
Second, the 1080p resolution was worth it. With today's 4k and 5k computer monitors, you want as much detail as they can muster. Grain reduction: I don't know because I don't have anything to compare.
Lastly, the end results were excellent. We had two reels from the same vacation. One was scanned by DigMyPics and the other from the local service. The difference is dramatic. We could read signs in the background that were a blur in the DVD quality scans. Faces in the distance were recognizable. Colors were true in the DigMyPics version.
And then there is the intangibles. Seeing long lost relatives come back to life... you can't put a price on that.