We have a good variety of birds that enjoy this mix and the best part is that there are no squirrels in sight. Probably the only downside to these feed blocks is that when it rains the blocks come apart as the birds eat. Probably impossible to avoid.
This feeder is very well-made. I love the tray which is easy to remove for refilling. We have a bear in the neighborhood lately, so at night I can just bring the tray indoors so its not a target for the bear. This feeder is worth every penny.