I rate this versatile putting mat training aid very highly. The mat can be used both outdoors and indoors for those winter evenings. The instant feedback provided is hugely important to develop a consistent face angle at impact which is provided with coloured lines on the mat. The waterproof putting mat comes conveniently packaged in a plastic tube which can easily be stored in your golf bag for that worthwhile practice before or during your round. Please speak to me for further details or see me at Three Rivers Golf Club.