Trying to solder wet plumbing is really hard to do properly and using a torch runs the risk of setting your house on fire. These fittings solve those problems. The fittings are well made and easy to use, just make sure to follow directions. A clean cut (don't use a hack saw!) and a clean pipe is vital to prevent leaks. I watched some videos on-line to avoid making mistakes. The tools that they sell for de-burring the cut, marking the installation depth, and undoing the fitting if necessary don't cost very much and I highly recommend that you buy them.I installed a couple of these in my cold water line while also installing some water filters because our water turns brown from sediment. As with all the other Sharkbite Fittings I have used these went together super easy (of course you have to use some physical force to push them onto the PEX water line but that's expected). Great value for the money.Bought several pieces at once, and if it wasn't for the cost, would have been a perfect 5.Super easy installUsed shark bites in many circumstances and have have good resultsNo leaks first time. So much easier than solderingWorks great, very easy install no fussing, no leaksWorks as advertised!I submitted a review about SharkBites before so this might sound like a repeat. I have seen SharkBite connectors for years but stuck to copper and solder. Had a new sink and washing machine to install and thought I would try pex and SharkBites. I can't believe I didn't do this years ago, it is so easy. I used these to split a line to a sink and washing machine. Way too easy. Yes, these cost more than other fittings but it's so simple to do you will be on to the next job while the others are struggling to get things done. Time is money.I've used Shark Bite for a few years and it is a really good product. If you use the PEX tubing and make sure the connections are secure ( all the way in) They do not leak. These fittings cost a little more but they work....no soldering and going back to repair a small leak. You can take these fittings out easily and reuse them again and again. A really great product.p.s. don't buy anything that doesn't have the shark stamp. I did once and it is not the same quality.I usually solder pipes, but given my limited space in my Reno I decided to try these. Wow, are these cool. So easy to use, so convenient. Worth the very pricey tag. I even bought more to replace some other piping in the house.So easy to use, just prep properly and you're set.Good parts great quality, only problem was order was over $100 plus and was under the understanding should have been free shipping however each part came from different shippers and I paid shipping 3 times, please get your ducks in a row not happy with this as it was all in one order.product like new, saved a trip to the store