This study investigates the impact of AI integration on user experience and satisfaction in online banking platforms in Sweden. Using a qualitative research design, in-depth interviews were conducted with users of AI-powered online banking services to explore their perceptions and interactions with AI features. Thematic analysis of the interview data revealed four key themes: user engagement, interface usability, efficiency and speed, and challenges and frustrations. It is encouraging found out that while on the one hand, some users expressed the benefit received from personalized guidance assistance from AI, on the other, some other reported it as a form of disengagement. While AI was appreciated for improving the interactions’ interface qualities, some concerns were expressed about complex navigational puzzles and inconsistent processing rates. At the same time, some users complained about the weaknesses of the AI, including its non-adaptive nature and tech glitches. The goal of the study is to develop a heuristic model for enhancing usability and accountability in AI interfaces, specifically focusing on the issues of customization. Also, it emphasizes the necessity of overcoming the ‘efficiency paradox’ – here, the need to provide reliable infrastructure and avoid becoming the ‘fastest hamster wheel.’ These findings have implications and ideas worth considering because more institutions are adopting AI solutions for their online banking, and strategies on how to make the customer experience better are important for financial institutions.