Bisquick it gets 68% on Which? (I assume you are belting it not using an Isofix base if you are looking at using in an Uber?) This is the review:
PROS Doesn't take up much space in the car, good safety results and isn't very heavy
CONS Lacks padding
The Cosatto Hold Group 0+ gets a good overall safety rating, but the padding is quite thin, and the seat is downgraded slightly due to some minor ease-of-use issues. The harness needs a good tug to get it tight enough, while the handle needs to be folded towards the car seat's backrest, which parents could forget to do.
How safe is it?
The results of our tough crash testing, where we ensure the seat is fitted correctly, show the Hold has a low risk of injury. It gets a good four-star overall safety rating. It provides excellent frontal impact protection, and good side-impact protection when installed using the car's adult seat belt.
Is the seat easy to fit?
It's fairly easy to fit this seat. It's quite lightweight and doesn't take up much space, but strapping your baby into the seat needs a bit of force to get the harness tight enough, and the handle of the infant carrier must be folded towards the car seat's backrest after installation.
Is the seat comfortable?
The padding on the Hold is a bit thin compared with others we've tested, but the seat is spacious enough for your baby, and support for little legs is good enough.
Is there anything else I should know?
The harness is quite hard to tighten enough, especially on the upper belt harness slots used for older babies, so watch out for this.
And the harness is a re-thread harness, which isn't the best choice, as there's a bigger chance of error when moving the harness to make it bigger as your baby grows.
Should I buy it?
The Hold gets a good overall safety rating, but it's not a Best Buy. There are other infant carriers available that are easier to use and offer better protection, but they might not be as jazzy to look at.