Does the US dollar go far in Croatia?

Could you please clarify, does the US dollar hold a significant purchasing power in Croatia, or are there challenges associated with its use there? I'm curious to know if tourists and visitors find it convenient to use the US dollar as a means of exchange, or if they face difficulties due to fluctuations in exchange rates or limited acceptance by local merchants. Additionally, how does the Croatian Kuna compare in terms of purchasing power and ease of use for foreigners?