Looks so fun, so many parts and accessories to this cooking set! Which brand issit? Can't really tell from the pictures. If it's from tried and tested brands like Fisherprice, I reckon it'll be sturdy and safe if assembled properly and you keep an eye on it while the kids play. Really curious as to which brand it is from...
I know of friends who bought kitchen play set for their children and it's not cheap. You can consider renting if you are keen: Step 2 modern kitchen set http://www.rent-that-toy.com/ToysInfo.php?id=243 This set can be rented for 4 weeks at $48/month.