Issues being that you basically don't have control over the domain, are limited to what godaddy allows you to do, get very crappy support on it when needed. And when it counts, because of their restrictions you end up with quite a risk of losing your domain.
As soon as they notice you got a bulk of domains and want to transfer away, almost all of them get locked, etc. Without you doing anything. And if you change 1 thing, they claim that the domain was managed, and can't be transferred for 90 days, etc. Despite that expiry dates are closing in.
They don't want to lose a customer, because they stay popular and big if their numbers are big.
It's the vBulletin of domain registrars, and I am glad I've moved to Namecheap. With all 200+ domain names. After 2 years of fighting over ownership, the ability to transfer something or update records, to actually properly manage them without losing settings and what not .. it was time to let go and stop wasting money.
A lot of ppl register, get it to point somewhere and never look back - and then claim they never have problems.
That's right, they don't do anything with their domain. They don't control name servers, or custom servers, don't setup fallover, mx records, sub domains, 25+ round robin pools, etc. And therefor never see the real problems nor realize how godaddy believes strongly they are the full owner of the domain, and are basically just holding it for you as long as you pay them ahead of time. Rather then helping you own a domain via their service.