Premier Inn charge for parking in their Titanic Quarter hotel, which is ludicrous given its not-exactly-central and not-exactly-congested location.
When we stayed there, they told us the window couldn't be opened. When we complained at 3am that we couldn't sleep because the room was stuffy, they opened the window. We got a refund of the price of the room but we still missed a night's sleep which rather undermined the reason for staying in a hotel in the first instance.
Rather annoyingly, Premier Inns in NI & GB no longer give their landline numbers but instead provide premium rate numbers which I understand can't be called from ROI (except perhaps at an extortionate rate), so its not just as simple as phoning them with your queries.