I have an upcoming trip and have the option of a 90 mins transfer in DOH to my connecting flight or arrive on an earlier fight and have 4 hours. Luckily I am in J so can utilise the lounge but I will have a checked bag. I think 90 mins should suffice but my journey originates at the delay prone LHR and with the baggage I am unsure. Nothing can obviously be 100% guaranteed but curious as to what others would choose maybe based off of past experiences. Thanks