I lived round the corner from this road for 7 years in the 1990s and it was absolute heaven on my NSR250 and then ZXR400. Best done on a weekday as it gets a bit touristy at weekends. This is the most enjoyable road Ive ever ridden. Just look at the shape of it on the map!
A really good stretch of twisty tarmac which begins by the A44 at one end. Not much in the way of spectacular scenary but a great blast and some good corners shouldn't disappoint.
Mostly medium/high speed flowing bends and some good straights. Midway Cafe (just south of Whitchurch) is a nice place to stop on this route.
A fast, sweeping A-road through the pleasant Shropshire countryside. A good alternative to the lorry-plagued A41. Apart from the 40 mph limit through Crudgington, this road is very fast and smooth. Beyond Hodnet, it's still a cracking road, but much tighter and twistier.
An utterly brilliant biking road, BUT one of the main caravan routes to the Welsh Coast. Go when it's quiet or you'll be frustrated to hell. Basically, Shrewsbury to Welshpool is fast open sweepers, Welshpool to Mallwyd is a fabulous mix of high-speed corners and some fast straights, and Mallwyd to Dolgellau is mountainous with spectacular scenery. If refreshments are required, Welshpool is really the only settlement of note on the whole run.