Good alignment aid, instant feedback of strike and roll, found it a good addition to putting mat
TLine has a nice protective leather case. The setup is easy. Using the straight line is challenging at first however helps start putts on line.
We all have our own preferences I am sure, but if you believe like I do that every putt is a straight putt (accepting there is break and slope to allow for - but you've still got to hit the thing straight), then this is simply THE BEST putting training aid I have ever used. Get in the groove and rolling in 10-12ft putts relentlessly is a breeze. A real confidence builder, whilst providing instant feedback when all is not well. Just as useful on the carpet at home as on the practise putting green.