Excellent! The rules live up to their tagline, 'D100 Gaming Made Easy.' The result is a smooth play style, unburdened by the snowflakery to which percentile systems so often succumb.

There is a great deal of fun to be had with BB:SS but it does not always succeed in its purpose. BB:SS offers a stripped down version of the D&D engine without a magic system. Magic systems are a notorious cause of rules bloat and are the bane of solo play, which requires mechanical consistency from the rules in order to differentiate gaming from daydreaming. BB:SS's 'sinewy' combat feat system is much more useful. On the other hand this set is hobbled by an unintuitive approach to saving throws: notably the designer himself has abandoned the the BB:SS ST rules in his more recent Blood & Treasure 2nd edn. BB:SS also imposes a cap of sixth level on character advancement; the level cap has been a bugbear of 'basic' rules since Holmes Blue Book. The Armsman, however, is an exceptionally fun version of the Fighter to play. In the end I hacked BB:SS with elements of Blood & Treasure and Bloody Basic: Weird Fantasy - the 'out of the box' experiment failed, but in fruitful fashion.

BTW is two games in one. The headline game emulates a particular genre of low-fantasy fiction by deploying Dungeon World-style playbooks and a collaborative world-building mechanic. Under the bonnet lies a very intelligently house ruled D&D engine (the only real irritation is the old school five saving throw system). The stripped down rules can be hacked into low magic playstyles quite different from the assumed setting. BTW could work for Hyboria or, of all things, Glorantha - the three tier magic system looks a bit like spirit magic, Rune magic, and ritual magic if one squints. Some iPad users may be driven to distraction by Flatland's love of the .zip file.