I've searched quite a few stores, and while I'm not buying anything, I'm interested in trying a Fender Mustang. I've never heard or seen one in any store, but I'm not too familiar with the sound. I really like Telecasters and Jaguars for Fender Guitars and was wondering what the difference is with the Mustang.

Does anyone have any experience with one to tell me a little about it? Kurt Cobain used one, but it was heavily modded, so I'm talking about stock features.

It's a Duo-sonic with a tremolo.

Older models are bunk. The Reissues are quality.

Imagine a Strat middle position without the twang, just the bright sound. Perfectly usable tone, not a lot of inherent character. Much more useful if you have a amp or effect that has a specific sound. They (Mustangs/Duo-sonics/musicmasters) were heavily used as trial guitars for amps and effects in guitar stores in the 60s-70s because they were cheap and didn't color the sound of the amp or effect that much.
Actually, I go by Dave, but there are already too many Daves on this forum.

Fender MIM Stratocaster
Fender Jaguar Bass
Epiphone EJ200 Super Jumbo
Fender Excelsior 13w
Acoustic B300HD (with matching 1x12 cab)
NYC Big Muff Pi