Would highly discourage you from using this. 40% of the items were out of stock but you are charged the full amount so you'll be waiting at least 10 days to get that back. Then additional time for this to be credited to your bank account as it's originally sent to your buymie account. (I'm still waiting for this part)
At least 3 items out of an order of 14 were completely wrong and kind of random. I've been changed almost 65 euro for what was a 20 euro shop had I been able to go to Tesco myself (and would have got the right products as well).
All in all, just a bit sh*t.