Good infant car seats always serve their purpose first, which is to ensure the safe travel of your precious bundle of joy. This means that the functionality of your seat trumps its look, feel and brand. (Look for a seat that comes with protection from side-impact.) Also, if the seat’s straps are too loose for your child’s height and weight, it doesn’t matter if it is that perfect precious-pink/ sacred-silver with Italian fabric; it is not good enough.
This is also the reason we recommend buying new infant car seats as opposed to using an existing one. (You never know how roughly the old seat has been used, even if it looks safe.) A good test for parents is to strap your child into the installed seat securely (so there is a little wiggle room), and see if you are comfortable turning him or her upside down in this position. If this makes you uncomfortable, your gut is helping you with good advice: the seat is not safe enough.