I have been having issues with the IP we're sending from being blacklisted due to another customers mailings - literally every time we try to send a mailing - meaning our spam filter/mail client (and the one we sell to the majority of our customers, who we're trying to communicate with) it is blocked, so they never get through. I would expect this to happen very occasionally, but this has happened every single time bar one that we have tried to send a mailing. It seems like a ploy to get us to pay for a dedicated IP, but we don't send enough volume to have one. I've managed to get on a "trusted ip" list, so we'll see if that solves that one problem, but that's just the beginning.
I couldn't access the support portal for the first three weeks of having the programme (even though I was the only registered account user, and the account admin), and I couldn't set myself as the support contact - that was all a massive mess, which was finally fixed.
I still can't access the University page - I have escalated this to T1 and still have yet to receive a solution for this.
I can't add other admins to the instance.
I consistently have trouble logging in, where it says my user name and password doesn't exist, can't reset my password, so have to email support for that.
The IP address was the big one, which is hopefully fixed now (after three weeks), but I was just wanting to see if my experience is a common one, i.e., is Marketo actually riddled with faults that no one finds out about until after you've bought the product, and the support is horrendous and we're all in this together, or am I just hugely unlucky? I'm not sure which answer would make me feel better 
Also, apparently the community doesn't like it if you say "push back hard *on* your account manager". Someone has the filters turned up pretty high 
HAHAHAHAHA I was wondering what you'd said there! 
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