We tested the Quattro Sit'n'Ride. Officially tested by 18 month old DS1. Like Gwendoline unofficially tested by 4 year old DD2 
~ How has your child played/ interacted with the toy?
He liked just sitting on it and using it as another chair! He loved just sitting, pressing the buttons to get the music going and then bopping around whilst seated. He also liked standing in front of it, holding the steering wheel, pressing the buttons and dancing in front of it! He enjoyed riding it, being pushed along it (by me, by DD2 not so much!) and he liked putting toys on the seat and pushing them along. He also liked hiding things (like house keys) IN the seat.
~ What do you think are the values of the toy - e.g. what does your child gain from playing/ interacting with it?
He's definitely got a lot more confident on any sort of ride on since having it. He's even attempted the wheely bug again which he had taken against since falling off a while ago, I think he got a confidence boost from the Quattro! He really likes the music and does a lot of dancing and 'singing' along to it. DD2 thinks she knows which one is his favourite tune! DD2 has also enjoyed riding on it and it has been good for making sure she bends her knees as she has to bend to get on it!
~ Any additional thoughts on the "Happy Moments" - have you been able to redeem the voucher? If so, please share what you did.
I haven't redeemed the voucher. To be honest, the only activity that appealed to me was the Creation Station and by the time I'd thought of booking it, the voucher had disappeared. Probably thrown away by DH.
~ If you had a talking toy did you like the function of also having the talking in a foreign language ? what did you think about this?
Our toy didn't talk.
~ If you had the Quattro Sit 'N' Ride ? did you like the adaptability ? i.e. that the toy can grow with the child?
We only used two modes. Initially I had it set up without the handle, then added the handle on to test it and ended up keeping it on as the kids were using it to play. I think that it certainly improves the longevity of the toy and each element adds another dimension, like adding the handle meant that DS1 could push his toys around.
~ Would you recommend this toy to other parents? Why/ why not?
Yes, I would. I think it's great fun, a wide range of ages would get a lot of fun out of it, it's sturdy and can take being bashed about and the tunes don't seem to get irritating (which I can't say the same of for every toy!) I would echo some of the previous comments that it is quite large, considerably larger than other ride-on toys sold for indoor use.
~ Do you think this toy is value for money? If so why, if not, why not?
Initially I thought it was quite expensive for a ride on toy but, having used it for a while, I think it is very good value for money. It's a big toy with lots of adaptability that will last a long time. The steering wheel unit with all the sound effects makes it fun for dancing and singing along too! If DD2 is anything to go by, DS1 will still be playing with this toy for another couple of years!
Thank you to Mumsnet and Chicco for letting us test this! DS1 especially has loved it 