We use coldstorage on a monthly basis to get all the bulky items in and it is fine, always turn up on time etc and bring the food in for us.
No idea what they're like for chilled or frozen goods and from experience I always opt to not have replacements made but they do have the option for them to call you before they do any substitutions if you want to do that.
For fresh food we just pick small things up in the week or we get a big delivery of fresh meat from www.thebutcher.com.sg
. Meat from the supermarkets here is hit and miss sometimes in my opinion.
hope this helps