You get what you pay for, and let's see why.

POSITIVES:
1) Very easy to open with one click and fold with one click!
2) Fits in the trunk, at the feet of the back seats, or even in the airplane cabin!
3) The wheels don't slip and handle everything
4) Soft seat and backrest that can be removed and washed
5) You can drive and turn it even with one hand
6) Quality fabric for the case
7) On the parent handle, if you want, you can also put a cup holder
8) Whether the child is small and doesn't pedal or does pedal, there is an option with one click, when the parent is driving, for the wheels not to resist and not to wait for the child to pedal—in essence, at this stage, the pedals are just for the child to rest their feet, and when they grow up, with one click, the wheels will actually wait for the child to pedal in order to turn

And now for the best part!! In all the bikes we tried, the parent handle would wobble and not respond correctly when turning; it took effort and strength to turn it where you wanted! The S3 NO! It turns with one hand wherever you take it!!

NEGATIVES:
1) Expensive, yes, when others cost €60, but it can't be compared!! VFM!
2) I would like the handle to be a bit longer in height
3) I would like to be able to move the seat a bit further back (right now you can only recline the backrest)

I have a baby boy (currently 11 months old). Before he was born, I bought the Doona car seat stroller, which is the most practical option for babies aged 0-18 months.
Very good quality and ergonomics.
When he turned 6 months old, I started looking for a tricycle and stumbled upon the Doona Liki Trike. I was thrilled because it folds up so compactly and fits into a school bag. Other "good" models simply fold in half but still take up a lot of space and are not easily transportable.
The Doona Liki Trike includes:
-The tricycle
-A bag for small items that attaches to the back of the bike
It has fabric padding on the seat, backrest, and child's protective rim, and it also has a fabric folding sunshade.
Additionally, the backrest has 3 reclining positions for the child to lie down slightly if they get tired. However, this feature is not particularly practical because the recline is very small and doesn't make much of a difference compared to other tricycles that recline completely and become little beds.
(The S3 model is the mid-range model in terms of features. The S1 is the simplest, with a 3-point harness and no armrest cushions, and there is also the top model, S5, which includes additional features such as a travel storage bag, pedal straps for reverse riding, wooden handles, a cup holder, and reinforced 5-point harnesses.)
The tricycle has different stages of operation depending on the child's age, like most good tricycles. Starting from 6 months old, the parent has control. Later on, you adjust the pedals so that the child can move the wheels, adjust the steering so they can turn on their own, etc. In the final stage, after removing the parent handle and the backrest, it becomes a small tricycle that the child can use independently.
It is the most expensive tricycle available, but for me, it's worth the money if someone plans to keep it until the child is 3-4 years old.
If someone can afford it, I highly recommend buying it. You can easily and quickly transport it anywhere. It even fits in the footwell of a small car's backseat. Finally, assembly and disassembly can be done in 5-10 seconds (it opens and closes with one motion, the only thing that takes a little time is attaching the parent handle, which secures with a pin).