I love how easy it was for us as an organization with limited IT resources (and budget) in order set up our ssl certs! We are able fix problems quickly when they arise without having someone from affirms team come out each time we have issues - which has been very few so far!! The price point isn't bad either if you're looking at setting this type thing up once or twice per year compared what other companies charge over $10k-$15K+.
There's not much negative about using their services but maybe more features would be nice? Maybe some additional pricing discounts could help too?? Currently only one cert needed because there will never need another certificate issued by them again unless something changes drastically like needing new security compliance requirements etc..