The Doona is the first product I recommend to my friends when they're expecting their first kid! I was hesitant at first considering the steep price tag and the longevity of the product, but I HIGHLY recommend parents make the splurge, especially if they are on the go a lot or prioritize space-saving products.
We have a tiny car so not having to lug around a stroller base has been a godsend. It's so convenient for running errands around town and a lifesaver when flying. We check the base and car seat when we fly and it's soooo nice only have one parcel to worry about at baggage claim.
The one con I have is how heavy it is, which was inconvenient while recovering from a c-section.