In regards to privacy, in Liquid, the amounts are confidential, but the trail of transactions are not. So, as mentioned in other comments, the anonymity set is very low and it can be guessed with good odds where the funds ended up.
It would be great if multiple rounds of Coinjoins or Payjoins could be done. They would be virtually impossible to correlate because the amounts cannot be seen. However, as of now, there's not much usage and I don't think there are any implementations of these on Liquid.
Nevertheless, I have used Liquid for their Tether stable coin asset when I needed to maintain some dollar denominated funds for a time. Also, it's great to have some L-BTC for keeping some funds for the event that BTC fees go up.
I've used Sideshift.ai mostly in the past. However, also, https://boltz.exchange/ and https://sideswap.io/ are good options which I use going forward.
Check another thread (#63401) where the topic of privacy is discussed.