Focus had well proven their ability to write rocking instrumentals by the time of this release. Their catalog, although consisting of four albums, rarely had a dull moment between them. Hamburger Concerto is equally consistent, much of it being prime Focus material. The Akkerman-written "Birth" and "Early Birth" are examples of Focus fully flexing their muscles, featuring superb guitar work and amazing all-round musicianship, as well as sporting some superb riffs. The usual lengthy instrumentals are present also, as well as some manic vocals from the manic but genius Thijs Van Leer. Although Hamburger Concerto is not as unerring as Moving Waves or Focus III, anyone who enjoyed the previous releases would undoubtedly find great satisfaction from this album. -- Ben Davies (allmusic.com)