I like that it's easy to integrate with other apps, has great tutorials online (which are often free), but also offers an SDK which makes integrating into web-based solutions even easier! It does not have as many features or functionality of some more expensive options out there in terms of charts/graphs etc., however this can be said about most open source products too - so you need both to make sure your needs will meet them all :) If budget allows then definitely go ahead & use one from these guys because their support team really know what they're doing when helping customers set up things properly!! We've been able solve our problems by using ACheney Engine quite easily compared against others we'd considered previously!!