have been using the 12 oz hummzinger highview for years, it's easy to clean, easy to fill, the design can't be beat, and hummers readily use it. i've tried cheap knockoffs too, and they're fine, just not quite as well-made, and with slightly inferior versions of the highview perch. i'd just warn folks to keep an eye on the price -- sometimes it's a reasonable under-$25, but sometimes it spikes to above $40 (for example, today it happens to cost nearly $20 more than it did a couple of weeks ago, and is also currently several bucks more than the 16 oz hummzinger highview). but otherwise this is a great feeder, i keep two or three in circulation at different spots in my yard or on window hooks for competing hummers to guard. they don't usually finish the nectar within the few days between cleanings so i haven't had a need for the bigger 16 oz version, but i'm sure it'd be great if you have enough hummers to empty the 12 oz in less than a week.