When Walmart starts selling essential oils, it tells me a few things: 1) there is a huge market for oils 2)they work 3)everybody wants a piece of the pie 4)quality isn't always the top objective
A few things to consider: 1) Read the label. Quite often they say to not apply to the skin. (uhm ok. If it is a real oil from a real plant, why not?) 2) Research the brand. Where is it grown? Harvested? Distilled? Do they use pesticides and fertilizers on their crops?
If you are looking to replace candles, these cheap oils might be a decent alternative. MIGHT BE. But if you are looking for an oil that works double duty: smells great AND makes you feel better, Walmart oil just ain't it.
Saying these are decent oils is like saying Taco Bell is decent mexican food. lol