This is copied from their site.

We offer installment loans with low, fixed rates from 1.99% APR to 23.99% APR*, or interest-free loans** for 3, 6, 12, or 18 months to qualified applicants. Either way, you'll be able to find an option designed to fit within your budget.

I do see though that they have a payment calculator with payments up to 60 months.

seems a good bit like so many credit card plans...rate is determined by your credit score...as low as 1.9* (whatever * means...lol)...maybe after a 'fee' is paid for the great 1.9% rate...or maybe 1.9% for a partial term of the loan.
Prepayment penalties?

The rate would likely go up for any number of reasons...like one late payment anywhere that gets reported to the crdit bureau.

Buyer beware is my thought on them.

Sue