The catch on the lid is so flush and tight with the lid you can't get your thumb under very easily, and when you do, you end up gouging your lower knuckle.
Around the spout there is engraved writing that's quite deep,  gets mouldy quickly and isn't easy to get out.
The spout was leak proof for 3 months and then it started leaking without sucking on it.
If its pushed in and capped it's better but the cap ends up with water in it, that sprays out when you open it, if the bottle isn't kept upright.
Let's face it who keeps a water bottle perfectly upright in a bag or, in my case, a mobility scooter basket. 
The only reason I chose this bottle was because it didn't have a straw down the middle, like my previous bottle, that never reached the bottom.