Infababy/Uberchild Car Seats

Hi, 

I was wondering if anyone has heard/used this company and products before, have been searching around for a new car seat for our toddler as he is just about to outgrow his current one, We have always used an ISO fix one so will always look only at those, I have been looking at the Britax evolva 123 sl sict and the Advansafix III SICT, but for for lightweight was swaying towards the 123 and also the Mothercare Tulsa. I have to say it does come down to cost aswell as potentially we need to order 3 of these (In-laws) on both sides moan about getting them in and out etc. My partner and I will share one and thats why I was thinking about the weight of the 123. 

Or if anyone has any recommendations please to hear them, my partner is spending hours looking at reviews/safety info etc