This is an excellent steam loco addon, although now starting to age a little. This model does not have advanced controls, only the standard ones. The loco performs exactly as it should do according to the specifications of the real A1 Class locos; i.e. it steams well (the A1 class were one of the very best at generating steam and maintaining pressure), it will cruise under load on the level at 90mph when handled correctly and is capable of reaching 100mph. As might be expected from such a powerful loco, hill-climbing is good for a steam loco.
Footplate sounds are fair for a TS model, though not spectacular and the chime whistle sound isn't correct (you also get a 'standard' whistle at 'B'), but these are minor details. However like most of the older models, it isn't possible to hear the AWS warning horn when your head is outside the cab window, so you have to stay very alert. It would be nice to see that feature updated. The exhaust is as good as most TS models and better than some more recent locos, though no TS steam locos get the exhaust absolutely right.
You only get the one loco with this pack (together with several coaches), though two reskins of the Tornado (BR green and BR Blue) are available elsewhere separately. However I would have liked to have had some of the original class represented as well.
It is still one of the best non-advanced control models.