David, I had one which I converted to Panis' Ligier. I am going to be frank. It's easy enough to build. But it is nowhere close to Tamiya in the quality stakes. Fine if you want it as a curbside model, but esp engin detail leaves a bit to be desired.
Can't answer on the decals, as I used F1 Specialties' decals to do the Ligier convertion. I am presuming you want that model because of the driver. I'd advise you (IMHO) that if you want an early (pre-Ferrari) Schumi drive, rather go for Tamiyas B192.
Btw, if I remember correctly, there is quite a bit of tricky masking involved for the blue and white borders, which is not supplied in template-form.
As said, the Academy goes together easily and makes for quite a nice curbside build, but it lacks a bit of detail. Also check some wings and endplates for being a bit too thick for scale - easy enough to rectify, though. Depends what you want/expect from the model. I'm not saying you should not buy it, just what to expect.
It's a very nice model in that it's almost the only F1 of that era, where Tamiya suddenly stopped bringing out F1's regularly. And the colourscheme is quite nice, as well.