For the price, I would probably go with the reusable Harman camera with HP5 for the value.
I have one of those sets and it's not the greatest, but it is fun and on the slightly flimsy side of the scale, and easy to toss in a bag and just go.
I bought one when they first came out and below are two samples with it using the HP5 dunked in caffenol.
I was having a grainy day of developing it appears, but yet...