Treat is as lottery. They are slightly cheaper from competitors, but..
well, what's the use if you can't even get the car. You may have read other reviews mentioning documentation. I'll add another one. They are, indeed, very fussy regarding documentations.
As a background, I'm an international student, so it wasn't all that clear which sets of documentation I would need (resident vs international). Just to be on the safe side, I printed my bank statement and tenancy agreement as proofs. Well, guess what? They refused these and insisted that any documentation needs to be dated within 7 days (it wasn't mentioned at all before) and if I couldn't provide gas/utility bill mentioned in the example then I would need a letter stamped by university, and they keep repeating I have read their T&C* so I should understand these. Good god.. I have no clue why tenancy agreement wouldn't count, isn't it, literally, a proof of residency?
Now, I understand that they are probably just trying to limit their risk exposure of loss/whatever as this branch owned (instead of leased) the cars. But from customer standpoint it is an absolutely ridiculous experience. It's very close to Christmas, thus, I can't even procure the letter as college office has been closed, and what's even more important is, the holiday for kids will be ruined now. Obviously they don't care a bit about these customer issues. Wonderful.
*to add salt to the wound, their T&C said that if they declined the documentation, then online pre-booking payment cannot be refunded. I seriously wonder if this is how they make their money. Also, to cancel booking (or in my case, making serious complaints), you have to call the main office with a very long queue line, can't even do it from the branch.