I think swings are one of those things that are a bit hit and miss - in my experience, babies either love them or hate them. Its quite a wasted expense if it turns out to be the latter. We had 2 bouncy chairs right from the start (which were invaluable) but I didn't get a swing until later on (say at 3 or 4 months) when someone lent one to me - and my 2 both hated it.
I don't have swings but I do have 2 bouncy chairs. I use them quite a bit in the afternoons when I am trying to get jobs done, like cooking dinner etc. My twins aren't crazy about their bouncy chairs but will sit happily in them and watch me.
Thanks Happyasasandboy! I think I will get two swings-particularly as I have a clingy 23mth old to tend to as well...(he'll be 26mths when the twins are due...)hoping the twins won't be as high maintenance.hah!! DS was (and still is) a right handful..
We had two bouncy chairs from the start, and bought one swing later (because DS loved to be rocked but I couldn't always rock him if DD was feeding).
I would say that two bouncy chairs or swings from the start are really useful (though you'd manage with none/one if finances won't stretch to two), especially if you have refluxy babies like mine. I never really got the hang of breastfeeding them at the same time, and they needed to be held upright after feeding, so I spent the first 3 months feeding then alternately, with most of their none feeding time in a swing/bouncy chair.
You can normally find second hand ones on eBay/at NCT sales, so it doesn't need to be an expensive mistake if you end up not using them
Good luck for your pregnancy and welcome to twin-motherhood