Saw a lot of bad reviews about Lazada, especially regarding fake products. I guess it's similar to another Singapore based marketplace (saw some fake Benefit Cosmetics item) as it's made up of a lot of small merchants. It's best to look at the seller profile before making a purchase. They are reputable brands as well.
I've made 2 purchases this year. Earlier this year, I bought an elderly friendly handphone and some stuff from Watson. It was delivered within the same week (I think separately, can't really remember).
Last month, I bought a fridge and signed up for their Live Up membership ($28.80 per year, but there's 60 days free trial). You'll need to sign up for the Live Up membership trial first. It takes about a day to activate. I was quite afraid of not getting the rebate, hence I waited till I got the Live Up confirmation email before I made the purchase.
The merchant notified me of the delivery a week in advance. Once the fridge has been delivered, I received the $50 rebate (valid for 1 month, for purchase on Lazada). I also used my shopback link to make a purchase and received about $10 worth of rebate (can be withdrawn after a few months), quite a good deal.
Both times, my order was smooth, products work well. There's no hiccups but it wasn't exceptional either.
For the LiveUp membership, there's free 2 months Netflix subscription during the free 60 days trial (making it completely free). Still considering whether to pay for a year membership ($28.80) as there's an additional 4 months Netflix subscription free. But after that, I'm unlikely to renew the Live Up membership as I don't think I will be making a big purchase anytime soon to justify the $28.80 fees.