Everyone wants sunset tickets for levels 124-125 they disappear quickly especially november to february. Book minimum 2-3 weeks ahead earlier for holidays. Level 148 costs more but better views and shorter queues. Basic 124-125 tickets fine though youre going for experience and views not fancy lounge. Metro Red Line to Burj Khalifa/Dubai Mall station gets you there easily. Factor in time to get through Dubai Mall to tower entrance that mall is massive and confusing.