I haven't tried the r7 Draw but I think your £149.99 is better spent on some lessons (would get you 6 hours worth at my local club). My local club does video lessons, which I found really helpful - you get filmed out on the range, hit 30 balls and then go to classroom for analysis. The Pro can...
You can also get software for Mac or PC that will allow you to keep a record of the courses you play, your score and number of putts/Fairway drives/GIRs etc (if you are interested in looking at your game in that much depth).
I have recently invested in a bit of software for my Mac called...