It would seem to me that most of the reviewers went to Blossom for rock music. That would tend to yield one sort of experience. Being the somewhat out-of-sorts guy that I am, I went with a friend to hear Rachmaninoff Piano Concerto number 2 being played.
It was, in a word, sublime.
The Pavilion is a warm wood toned structure, shaped like a great shell. The open structure allows viewers sitting on the grass a view of the stage, which is lit by warm incandescent lights that suffuse the environs with an almost golden hue.
In the starlit night, it's reminiscent of a fay sort of scene; something out of the Lord of the Rings -- particularly when the sounds are something a bit mellower.
Drawbacks would include the use of area mics to pick up the sound and pipe it to the grass seating. Speakers always degrade the sound of a live orchestra. I suppose it is part and parcel to rock bands... but it intrudes on the purity of sound and resonance that I love about places like Severance.
Parking is a bit of a bear... and so is the walk... but if you regard it as a walk in the park, you'll find it much more to your enjoyment.
Make sure you stop a moment to enjoy the view of the stage in the night. It's breath taking.
I particularly liked seeing the entire orchestra in a summer white tuxedo motif, which positively glimmered under the brilliant stage lighting.
Next trip out, I might have to try sipping on some wine on the surrounding patios, before heading in for some sound under the pavilion's portico...