We bought two ($20 ea) Aldi Sleeping Bags (Synthetic fill) for our kids (sleepovers, caravan camping) but I ended up taking one on a 1 night overnight hike on the Great Ocean Walk. (I was confident that by being near the sea, the temp would be mild O/Night, so I wouldn't risk freeing by trying it out)
I am a warm sleeper.It was clear nights and quite chilly (but not freezing) and the bag (I was in a cotton inner sheet - daughter had the silk one

) was very warm. I was
very impressed.
I would be confident in using these on any non-snow hike. I would use them for snow camping (
in conjunction with thermals), but I have a 1kg down snow bag anyway.
Relatively lightweight for carrying.
The compression bag worked very well.
Zipped pocket under hood for inserting jumpers for "pillow" - which I didn't notice until it was airing on the line when I got home,

Haven't washed it yet and I obviously can't comment on longevity - yet.
The experienced hiker who was leading the walk (it was a scout hike - I was a parent helper) was a bit dubious when I told him what I had, but when I got it out to "loft up" I showed it too him and he was impressed as well.
Thoroughly recommend for kids needing a bag for school excursions, scouts etc or for adults caravan camping/backpacking. For $20, I was amazed.
The only downer on the hike was that my 22 year old Macpac Backpack had "issues". The foam covering on the pad in the small of the back disintegrated and covered my back with sticky granules and the shoulder strap separated from the frame due to the plastic covering falling apart.

Well the pack was 22 years old, been heavily used and hasn't been used for 12 years (since birth of first child) - not complaining.