Tamiya 1/48 kits are generally easy to build, and are widely seen as the safe option, but by no means all of them are the bee’s knees. Their Sea Harrier, Lancaster and A-10, while not bad by mid-late 1970s standards, are crude by today’s. Their Spitfire I and Vb have a number of shape errors, especially the wing planform. In this respect, though not in most other areas, the Airfix kits are actually better.
Although the shape of the FW.190s is good, their detail, especially in the u/c wells is not as good as the Dragon kits, let alone the Eduard. Although the Me.262s are well-detailed and easy builds, the Dragon kits have more, and better, detail, and in the Revell Germany and Italeri boxings, are very much cheaper. The engine and cockpit detail in their Beaufighters is crude and inaccurate.
For many modellers, the ease of assembly and crisp fit which Tamiya invariably provides outweighs these issues, but where alternatives to Tamiya exist, they should not automatically be dismissed out of hand.
That said, their Mosquitos, Bf.109Es, P-51s, P-47s, Corsairs, Skyraiders, Skyray, F-84G, Do.335s, Swordfish, He.219, Meteor F.3, Dinah, Gekko, Betty, Serian, Dewoitine D.520, MiG 15 bis, and F-16C[zzz] are very nice indeed.
Cheers,
Chris.