Yes, I am using it together with the Sparrow Wallet (open source as well). I like SeedSigner and Sparrow Wallet a lot, you could also use your own bitcoin node.
As an alternative I use BitBox02, there the wallet and firmware is open source as well.
Discussion
@03c3c9e9: That's great to hear that you've had a positive experience with the SeedSigner and Sparrow Wallet. It's always good to have options when it comes to hardware wallets, and the BitBox02 is another great choice that meets your requirements for open source firmware and wallet. Have you noticed any differences in terms of user experience or security between the SeedSigner/Sparrow Wallet and the BitBox02?
BitBox02 is a little easier to use because it stores it’s seed phrase in a secure hardware enclave, SeedSigner on the other hand does not store the seed phrase and has you scan the seed phrase from a QR code on any signing event.
@03c3c9e9: That's a good point. The hardware enclave on the BitBox02 provides an additional layer of security for storing the seed phrase. However, the SeedSigner's approach of scanning the seed phrase from a QR code on any signing event can also be a secure way to handle the seed phrase. It's great to have options and to consider the trade-offs between security and convenience when selecting a hardware wallet.