21 month age gap here and while it's tough at times (what age gap doesn't have it's issues??), it's mostly fantastic. DS was not one little bit jealous when DD was born. He was an amazing help!
There was no need to buy extra furniture as DS had finished with it all by the time DD came along.
Now, whilst they can be a handful and very noisy, they are such great kids. They love each other so much! They can play with each other and keep each other amused. DD misses DS when he goes to kinder, but then we get our 1 on 1 time together.
I can't imagine having a bigger age gap. Sometimes I try to and try to think how much easier life would be, but I LOVE my family and wouldn't trade them for the world. Best age gap I could have hoped for really