Improve your splits almost immediately. Actively stretch hamstrings, hip flexors and groin quickly, easily and most importantly effectively with PNF style stretching. Stretch through both split positions, front split and middle split. Even if you aren't looking at getting your splits just working these positions will drastically improve the mobility in your hips. Have you ever seen a dancer or gymnast who had poor mobility?
In addition to the benefits of flexibility, say goodbye to hamstring injuries. The Strexi is also a potent hamstring, groin and hip flexor strengthening tool. Even potentially more effective then Nordic hamstring curls and easier to use.