Jury is still out on attracting Orioles. It is mid-may in Md.  Our Oriolefest Oriole Bird Feeder has been out about 2 weeks yet, but not Orioles. Hopeing they evenetually find it! 
The feeder is made very well with strong plastics. It has a nice look and appears to be well thought out. This is only type of Oriole we root for. ;) Go Yankees!