The best tool I have used so far was timextendr which made my life easy by providing me with all possible tools required at one place like ETLs/Extractors etc., it also provides you everything from designing queries as well writing scripts using python or R language itself along-with its GUI interface makes things easier than ever before!! Nothing really comes out negative about this product but would say nothing special except some minor issues here & there! It's good enough if your budget can go up higher because their pricing structure isn't cheap compared other similar products available online now days!! Make sure what kind of features are needed most since they provide almost every feature under sun including connectors(ETLS), extractor (CSV) files creation via UI designer option provided!