I will second the OU, both me and my wife got access to higher education through the OU and successfully transferred credit elsewhere. It was still cassette tapes and books back then, but those materials were excellent. The difference I see now is that the funding is not as good from the government for UK learners. I didn't pay a penny for my courses.

OU is pretty interesting, and I've always heard really good things about it, at least from people in the UK nations strongly associated with the UK. But one thing the GP asked about was how US employers feel about it, and I wouldn't consider OU a well known school in the US.

Some people have brought this up about UoTP, and I think it may also apply to OU in the US: The name makes it sound fishy.

Slightly unrelated, but I find it weird that I, an American, can apply to some their law degrees, but not a number of fully-online STEM degrees.

Unfortunately, the OU is now a lot more expensive than it used to be. It's a shame it can't offer anything at the price of this University of the People.

Another vote for OU; I haven't attended but from an employer perpective, OU grads have had excellent depth of knowledge.