I couldn't agree more with the pluses made by other reviewers; see any 5 star reviews.However, it has 1 major drawback as general purpose test leads.Lantern tipsThe head of the main probes is flared like a male banana jack, Fluke calls these 'lantern tip probes'.  This is helpful when inserting the jacks into banana females and for much electrical work, but when probing tight spaces like circuit components or feet of through hole DIP ICs, and worse on SMT components, lantern probes make the tips too wide, even if they are sharp.  Sometimes minigrabbers will work, but most times simple thin leads are all that's universally needed.Worst of all, you cannot insert these probes into a NEMA power socket to check the status of the hot or neutral lines, but it will fit the ground plug.  They are better for general electrical work for circular holes found in European style power sockets.In addition:PVCPVC is widely used, including as a low cost insulator for electrical wiring.  Alas, both in the EU and USA, there is a move to restrict its use for consumer products because its plasticizers is associated with major health issues; soft PVC [e.g. wires] is more a problem than hard PVC [e.g. drainage pipes].  Its not a problem for wires installed in homes, but as a test lead the user makes daily contact with PVC, or if ignited accidentally such as during a current surge or a solder iron misplacement, may release dioxin.Other than that, these leads are just as electrically good as a $50+ Fluke lead setFluke Corporation TL220 Industrial Test Lead Kit.What does >3x more cost get you?  The Fluke probe tips are the common thin design.  Fluke leads use silicone-rubber instead of PVC, a more expensive insulator that is lighter, and inert [its used from breast implants to tubing used in the food industry], more supple, soft, and easier to grip.  The Extech use PVC.  They are both electrically capable of CAT III-1000V rating and more, but the Fluke materials make probing with these leads repeatedly less taxing, something a professional electrician would notice with daily use.In September 2010, Extech released their own silicone test leads and kits.  It uses the standard thin probe tip, like Fluke.  A pair of the Extech leads alone cost as much as their entire PVC based test lead kit, so part of the Fluke's higher cost is at least in the materials.