Okay i got the keepall for my trip to thailand next month. My sister is leaving for thailand first tomorrow. I dont know what treasure she is putting in. Must be a lot. Now she cannot have it zipped up. OMG! So we are exchanging it for a 60. So tell me do we need the strap? it cost abt SGD300(USD200) more. Its not a lot of money but i feel that if the strap is not comfortable/practical its a waste of that money.