There are lots of really bad Lily of the Valley synthetics out there. They give me the synthetic "third eye headache." This one is the best I have found. Lily of the Valley is a very difficult, elusive flower scent to approximate. Without going to a much more expensive product, this one does just fine.
1/6 oz roller applicator bottle $9
1/8 oz $6
1/4 oz $11
1 oz $38