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All in all, this is not an incredibly big cage, but for birds that can become acclimatised to their surroundings and can fly around the house outside of the cage, such as budgies, it's very useful. We allow our budgie to have free reign of the house (he often flies back and forth between upstairs and the lounge when he wants) and he pretty much uses his cage as his own private bed/dining room, in a way, and it provides that function very well.
The cage we got came with a swing perch that he uses to sleep on at night, though I don't know if all the cages come with this as standard as we bought ours from the man who sold us the budgie. The two feeding dishes at the front are easy to access via the perches directed towards them, though you do have to refill them about once every two or three days as they don't hold an enormous amount of food or water. The bottom of the cage, too, needs changing regularly, as birds can be fairly messy creatures (you will find feathers everywhere, especially as your birds grow, and the bottom of the cage basically doubles as a toilet). Sandpaper is required at the bottom of the cage and on the perches to allow your birds to keep their beak and nails trimmed, and these too need changing regularly, as the sandpaper does go smooth after a while.
The cage on the whole is fairly light; whenever we have to leave our budgie with friends or family to look after (e.g. if we go on holiday), the cage is very lightweight and easy enough to carry over to another location. Having owned the cage for about 5 years now, the perches have remarkably all remained intact and haven't snapped off. They do sometimes become flimsy when our budgie walks to the ends like some kind of daredevil, but it just takes some careful repositioning to put them back in solid place.
The only noticeable problem with our cage is that a couple of the cage bars have become flimsy and have snapped off; whether this is because our cage was pre-owned and old I'm not sure, but you certainly don't want your pets escaping, especially if you have ones that aren't exactly supposed to leave the cage (finches, for example). One the whole, however, this has been a very good cage for us, and for our budgie, Baldwin.