That is a lovely bag! I've not got any experience with tweed but have heard it wears out more quickly than leather. I don't know how the design of this one compares to other Chanel tweeds – might be worth looking them up on the forum to compare the pattern with other tweeds from different seasons, it may change your mind about this one or confirm that it is absolutely the one for you. In terms of whether to go for tweed or leather, you may want to think about if you're planning on using the bag everyday versus on special occasions, or if you just want a bag to enjoy and you don't mind if it gets worn out in the process. I think any Chanel flap will always be timeless! It might be nice to have something that's a statement piece, a bit different from the typical leather bags, especially if this pattern is a one-off. Have you seen any other bags that you like that you may want to go for instead?