@KimR
I’ve tried the Martin backpacker and would not recommend it. The tone is terrible and due to the shape it does not sit nicely on your leg. You really need a strap and even then you have to squeeze it to your body with your arm.
The only thing it’s got going for it is it’s size and portability. If you can get one second hand and super super cheap then give it a go.
I’ve been round the block with travel guitar research. Have a look here.
Travel guitar - any recommendations?
and here.
NGD - Travel guitar