I have been using 2FA on NameCheap since you added the feature, but it's one of the more annoying implementations -- compare to Google's 2FA setup, for example. There I have to jump through the hoop of getting an SMS once a month (and verify my password a bit more frequently).
For NameCheap, it's every single time I log in, which translates to every single time I need to do or check something in my account.
This is probably only a minor annoyance for most of your customers; for me it sometimes means I can't sign in. I live in an area with fairly poor mobile coverage, so internet access & ability to receive an SMS do not always coincide. I'm also not tied to my mobile, so I may need to go find it where it's charging downstairs (or plug it in if it's dead) before I can continue.
I'd really appreciate either the option of a code generator (Google Authenticator, Authy, etc.), or a longer "remember-me" time -- it's rather more likely that my phone would be stolen than my laptop... so letting the laptop I've just double-authenticated be a "thing I have" is perfectly valid.