Great microwave steamer. Gets the job done faster than boiling in a pot of hot water and safer because you don't have a large pot of boiling hot water on the stove just waiting to be dumped on you or someone else. I burned my hand from coiling water while moving items around in the pot. It's relatively simple. Put some water in the bottom of the sterilizer, put the items you want sterilized in, cover, and place in microwave for a few minutes. I would caution, do not sterilize plastic! Everything should be glass or silicone. Plastic will melt and/or break down and you risk those chemicals being leached into your baby's food or milk. I had a teething ring that I thought was silicone, but it turned out to be plastic and it completely melted and was destroyed. Thankfully, the sterilizer was not ruined. I didn't use plastic much for my son's things, so I felt OK using a plastic microwave sterilizer. Sometimes the lid doesn't click on properly. You'll have to fiddle with it a big most of the time. There is a steam release button at the top, so when you take it out of the microwave you release the steam and allow the items to cool before you take them out.I bought this before my son was born and continue to use it several times a day for the last 11 months. This product is great!!! It arrived early and was exactly as discribed. It is convient and worth every penny. I have used it for 11 months up to 10 times a day and it has held up and works great. The ease of use and large size are great!!! I love it and buy it for all the new moms I know. It is my go to product for new moms and it is my most recommended product for sterizing everything from binkies to bottles to spoons and bowls, pump equipment and sippy cups. I use it all the time!!! Best investment ever. I recommend this product, it has my new mommy seal of approval. Love it!!!!I bought this for my newborn niece along with the First Years Breast Pump and Newborn Bottle Kit. I tested it out in our microwave and it looks like its working! It comes pretty much ready to use. I put in some bottles, pump pieces, etc. with 7oz of water set my microwave to 4 minutes and presto! I am not sure if I am draining the excess water right though. So far I've been removing the whole sterilizer from the microwave and tipping it over the sink to let the excess water fall through the space between the base and the lid. I feel like if I open it to drain the water all the pieces will fall out and the steam will burn someone. The momma and grandma love it because it's so easy to use.I wasnt going to get a sterilizer but my hubby baught it for me. It is amazing it cut my boiling time to 4 min rather then 10 per batch. the lid is tough to get on but not so much at the sides but in the center. However it is a great product to save time and if you wash your bottles well then you dont get the mineral filmy build up on them like you do with boiling.This is so easy to use. You just put water in the bottom, add the items you need to sterilize, and microwave. Voila! The only reason I didn't give it 5 stars is because I really think it'd be nice to have an indicator on the top so that it's easier to open. I find myself just turning the circle piece and pulling until finally the pieces match up to release it. Its fairly annoying.It could just be me, but I have trouble getting the lid on sometimes. I have never used one of these until now on my fourth child. It works like it's suppose to and easy to clean. I like using it as well to store the bottles in when I take the baby to my moms or somewhere he will be staying a while. That way they can use the sterilizer as well and I don't have to put bottles into the diaper bag to take up space.This bottle sterilizer fit inside a small microwave easily. I was concerned because the microwave is my daughter's where this sterilizer will be used most often. I had not measured the microwave, although I did read the dimensions of the sterilizer & made an educated guess that the size would not be a problem. I ordered it, and it worked out terrifically! I read some of the reviews where the middle piece on top broke for some people. If you do not carry it around using the middle piece as a handle then you will not have any problems.This sterilizer is simple to use, compact to store, and works beautifully. It is pretty small, but it easily fits 4 bottles or my pump flanges and a few nipples. works perfectly for us.I didnt give it 5 stars because the hinge to the top vent broke shortly after we got it, it is stuck closed. but venting this way is unnecessary to sterilize properly so it still works well.El color del esterilizador no es transparente, lo que no le quita funcionalidad, entra hasta en un microondas pequeño, a mejor precio que en tienda departamental, bien empacado llegó antes de la fecha acordadaPractica y buena calidadBuen producto, es bastante eficiente ya que en cuestión de minutos esteriliza las mamilas, sin la necesidad de hervir aguaEs pequeño pero muy fácil de usar y cumple con su funciónBuenísimo el esterilizador, no le pide nada a otras marcas más reconocidas y por ende más caras, no gastes más en otros!