My SiL has offered to lend us their maxi cosi carseat, which they would have had for about 18 months by my due date. I know it hasn't been involved in any accidents and was bought new. However, my DM is concerned about us using it on the same basis that it is not advisable to use a second hand mattress for a newborn.
I think this sounds a bit over the top but would appreciate anyone else's viewpoint!
TIA!