Don't worry, they are very helpful and you can have a listening session for as long as you want (within reasonable limits, of course). No one will bat an eye I can assure you that!
Yo relax lah , been patronize them since I moved to woodlands donkey years ago while they had a flagship store in causeway point 10 years ago .
The one at ion was also my frequent visit until they closed shop.
Never bought anything at vivo be4 , bought a couple of cheapo at plaza sing , ok lah service wise . Me Boh complains .
This is something very rare to know there's still such ppl exist in SG nowadays loh .