Great Product
I first decided to get this water bottle when I heard the concerns with some of the plastics used in others. I figured as much as I was drinking out of my last bottle, might as well be safe and get one of these. Here are the
pros:
-As I mentioned, it's metal
-The metal doesn't pick up funny odors or tastes as my plastic bottle did
-Seals well and doesn't leak (as long as you turn it all the way shut)
-Holds plenty of water (40 oz.)
-Easy to clean, just put some vinegar or baking soda in it, there aren't any crevices that are difficult to clean either!
cons:
-Bulky (well obviously because it holds 40 oz., hardly any wasted space)
-Dents easily (doesn't affect its function, only its looks)
Well the cons don't bother me and I have found this product to be extremely useful.

Great Deal!!!
Best price for the volume held. Easy to drink out of, carry, and clean. Finish work is not the best (logo is bleeding off and one bottle has a malformed lip), but durability is good. I use mine EVERYDAY and I LOVE it! On few occasions I have noticed a metallic taste, but it was gone by the next cleaning or water fill up. NO leaking issues, and mine are on there side about 50% of the time. HIGHLY RECOMMEND

Getting Away from All Those Plastic Bottles
I recently purchased two of these bottles to get me through the day at work without all the plastic I used to go through with the half liter Aquafina's I drank.

The bottles are great. Mouth of the bottle is large enough for ice cubes (though I don't use them) and to drink from. The loop cap fits snugly and I do not anticipate a problem with the o ring. The wide mouth also makes cleaning the bottles a snap. I am very pleased with this purchase!

Recommended Klean Kanteen alternative
The main reason I chose this bottle over Klean Kanteen (KK) is that it comes with a stainless steel (SS) cap, whereas KK charges extra money for the SS cap (shame on KK). This turned out to be a very good alternative to KK and did not disappoint. I was at first concerned with two potential issues others have mentioned, i.e. the metallic taste of water and denting of the bottle. But, having used it for a while now, I have not experienced either problem. I will discuss the quality of the cap later.

Initially there is a metallic smell inside the bottle. Instructions on how to clean the bottle are actually printed on its sides: use diluted vinegar or baking soda. To get rid of the metallic smell inside the bottle by filling the bottle with diluted vinegar overnight. As for the metallic taste, I wouldn't say the water actually tastes metallic. It's more accurate to say that the outside of the bottle smells metallic when you are drinking from the bottle, but the smell went away pretty fast for me (which will not be a nuisance to the majority of the population).

The construction of the bottle is very sturdy. I cannot see how someone could claim it dents easily, except perhaps by filling and dropping it several feet up.

A common complaint about SS bottles is that they are too cold to hold when you fill them with iced drinks and too hot when you fill hot drinks. I am using this bottle mainly to hold hot tea while I go out or when I go to work. I wrap a sock over the bottle, and that pretty much solved the heat problem for me (this also works for iced drinks by making the bottle easier to hold while absorbing condensation forming outside the bottle).

Because the cap is made of SS, it does make noise when being turned, but not so loud to attract attention. I have not had leaking problems so far. The only time when water leaked out under the O-ring seal is when I put near-boiling water into the bottle and turn it on its side, which is not something most people would do.

I highly recommend this bottle to anyone seeking an alternative to plastic water bottles and the rather overpriced KK bottles. Its SS cap makes it much more cost-efficient than the KK bottles, and the quality does not disappoint.

Good Stuff
Easy to carry, holds lots of water and keeps it cool for quite awhile. A lot healthier than plastic, and less likely to end up in the landfill.