Good luck with the HM!! I’m currently preparing for a 25k next month, and the pacer is priceless - did a 15k training with it today and it’s really great, helps me tremendously to keep a more or less even pace. I just hate the voice notifications so I only use the on-screen / wrist tapping pace alerts.
On the ghost run, the default view was a bit annoying, I had to tweak it - it shows whether you are ahead or behind (and how many meters), but it’s not showing the actual pace! Instead, there’s the remaining distance, quite redundant information if you ask me - when you run the same route repeatedly, you kinda KNOW how many kilometers are left

But it’s adjustable, so it was bugging me only with the first ghost-race run.
Ok and now I yet need the Music app to finally start showing particular tracks’ BPM, so I can easily filter a playlist that would match my target SPM… that would make running with the Watch just perfect..!