Rupert
I think the description 'systems' can be misleading at times. I tried Brimardon which says it's a system and it is in the software sense of the word. They give you their ratings for every race but these aren't 'tips' and you have to then apply your own filters...so what's the point of them I hear you ask?? After blowing 2.5k on their subs I asked the same!
Then I tried others who are say to be system based but which select the runners and the bets for you. Depends how much you know about the game I suppose and how much time you have to do the filter bit or whether you want to be spoon fed.
I went the spoon fed route and have been making money pretty consistently over the past couple of years with traveltheturf.co.uk and before that with isiris although again they aren't cheap and shelling out 2k up front worries me no matter how much I had made in profits. Have tried some others (Mel Collier, Centaur) from time to time but found conflicting recommended bets (and loads of bulls**t too!!) and sometimes did nothing as a result and missed winners - better to stick with one tipster and clear the mind of what else is around. Hope this helps you and good luck. There is money to be made.