I wouldn't, I've seen it go badly wrong and read so many threads here that are enough to put me off alone!
I do know of a couple of successful blended families but even there there's been resentment, biting of tongues and Disney parenting.
I've also been a stepchild and that was a thoroughly miserable experience too. My stepdad was resentful, angry and abusive and was brought into my life with no reservations or question.
There's a phrase thrown out here when everything goes wrong 'you knew he had children...' and whilst that's frustrating and unhelpful it is kind of true too but not in a blaming way.
When kids are involved it's important to sit back, observe the dynamics. How do the kids behave, how does your partner manage that, what's communication like with the ex, do we have the same parenting values and expectations.
It's not foolproof and shit can still hit the fan but I think understanding the dynamic is vital.
As an ex social worker I've seen enough awful situations to want to actively avoid a new partner in my children's lives too. So living together would be out of the question at least for the first couple of years or more.
Someone at the beginning of the thread used the word 'inflict' and was pulled up on it but actually it's pretty accurate in many cases.
Children generally don't choose their parent's new partner, they don't play a big role and in some cases their opinions are actively dismissed.
My stepdad was inflicted on me, the difficult ex was inflicted on my friend.