Most of the effects, when used subtly or well within their parameters (compression, expansion, gating, limiting, but also reverbs and delays etc.) work as well as most bought effects. But once you start to push an effect to the point at which it exerts it's own "stamp" on the sound, this is where the different effects, each with their own particular characteristics (read algorithms) generally begin to distinguish themselves, and one becomes desireable over another. At this point it is very much a matter of personal taste, but keep in mind that some of the cheaper or freebee effects may not be so useful when they are pushed into their operating extremes. To know however, you have to try it and see.
Build a man a fire and he'll be warm for the day; set the man on fire and he'll be warm for the rest of his life.
Sun Point Studio Turbenthal, Switzerland
Cubase 7.5 - 64bit | PT10 | UR28M | CMC-PD/4xFD/QC/AI/CH/TP | BCF2000 | Shuttlexpress | Lenovo E31 Workstation:Xeon E3-1225V2/3.2GHz; 8GB DDR3 SDRAM; 2x Intel-Flash520 SSD 180GB (C:/D:);1TB 7200rpm Sata3 (F:); DVD RW (E:); Ext. 3TB USB3 Freecom + WD 1TB; Nvidea GeForce GT 630 4GB DDR3 Video Ram AGP PCIE | Win 7 Pro 64 Bit