I have Rank Tracker set to fire off every morning around 4 to do my bidding, er checking. It works great if you use paid proxies, but using my own IP it just asks me to fill out captchas. I imagine I could set it to run slower to avoid that. I do have the whole suite, but only found that Rank Tracker was the only tool I had a use for.
Updates seem to be fairly regular, about every 2 weeks. As for pricing, the amount of time it saves me on a weekly basis had it paid for itself in about six weeks.