You might want to review the text on your faq page and blog page for inconsistencies. One place says each of the 5 accounts can have almost unlimited priv/pub key pairs and another spot says only 232 key pairs per account. Wtf? If it truly is BIP32 hd wallet then account would have unlimited key pairs. There are other inconsistencies also but that one seemed extra weird. These kinds of things makes the project look scammy to me. Also if someone were to get your card and paired device could they not easily empty your wallet with the tap tap? Other than that, I think it's a cool wallet that I would use.