I think that's the problem with social media in general - if you research anything long enough, you're bound to find a few comments from disgruntled individuals who weren't satisfied for one reason or another.
Is their gripe because they didn't manage their own expectations appropriately? Did they follow the post surgery care advice to the letter? Did they have any pre-existing issues with their scalp? Or was their gripe a genuine one? We simply have no way of knowing.
Before I used HGC I spoke to a number of people who'd used them. Saw a couple of video diaries online, as well as the pre-surgery vids they send out before you go.
As someone who was between a 4 and 5 on the Norwood scale, I am not expecting manes and manes of hair akin to a cave man. Just that it will be a little more aesthetic than it was before - I've just posted my latest pics on the other HGC thread here:
https://www.hairlossexperiences.com/threads/hgc-romford-3000-grafts.10924/#post-86392
Try not to worry too much. Remember it takes 15 months before you get your final result for the temples, and a further 3 for the crown.
I anticipate at this point I'll most likely book a "top-up" appointment to add a bit more density. If I'm not completely 100% that is.
Good luck