Tried Frollo. They try to do automated transaction tagging but it doesn't work so well and that's the only unique selling point over a spreadsheet.
Banks don't genuinely want to push Open Banking, legislation is forcing them to support it.
I don't want more app and data complexity. I want my bank to automatically generate and forward a transaction history for for my local use. I shouldn't have to log in to obtain such things.
Open banking is just starting here and I'm hopeful it would be useful in the future. Ubank allows me to add other bank accounts but not see a merged transaction list or export an aggregated list. This would be quite useful for whole of account overviews.
Give it 1-2 years and it should be pretty sweet. Transaction accounts are the least important for banks. Open finance is already implemented for mortgage checking purposes by banks.
I've never really considered them. My first thought is around security issues, though I don't know much about the space.
That's the nice thing about open banking is that now the banks are providing a read only API for 3rd parties that you've explicitly authorised the token for and can revoke at any time. Of course everything has potential security issues, but this is really more about privacy I think. You're sharing your financial transactions with that 3rd party. They have obligations under the open banking rules, but it's still an extra copy of your records sitting somewhere. But the upshot is potentially pretty big if you have multiple accounts, being able to see it all in one place.
I did read about that a few days ago, though it doesn't stop the concept from being unnerving. I'm too used to being cautious with my data.