- Shared to do lists (e.g. with your partner/spouse)

- Very good platform coverage of clients

- Good UX

I don't think the set of features is too impressive by todays standards, but at the time it was pretty appealing compared to the competition.

Surprisingly (I thought anyway) WL was one of very few which support shared lists effectively.

I bought Things for mac for myself and my partner at the time and was blown away when I discovered a $60 CAD To Do list app couldn't share a list. WL ended up being the best option by a long shot.

These days I use Todoist which can also share lists nicely.