Almost as convenient as breasfeeding
These bottles are great because they completely eliminate the need to measure and mix formula, and you never have to wash another bottle. (I use them with disposable nipples). My baby likes them too; he actually seems to prefer the ready-to-feed Similac over the Similac I mixed myself. Bottles are also especially useful for travel. I'm serious when I say they are almost as convenient as breastfeeding. Extra time is always golden when you have small children, so if you need to bottle-feed, these are definitely worth the price!

great for travel, do not contain BPA
First off, the bottles DO NOT contain BPA. The lids are coated in an epoxy that does, but there is another layer over that to help protect the BPA from getting to the formula. I actually called Similac's parent company to verify this.

Yes they are expensive, but I get coupons all the time from Similac and use those to buy these bottles. They are wonderful for camping, fishing, or any other time sanitation may be an issue. All you have to do is attach your own nipple and ring. Much less to wash.

Though they are really not made to do it, you can punch out the center from the ring and put in a standard nipple. It seems like it will leak, but it doesn't. Then you can just throw the whole thing away.

Convenient but BPA issue
I loved these since they are so convenient. I hate powder formula since I always have problems with clumps and they are messy. It was so nice to just open one of these rather having to mix and shake and get powder all over the place. And they carry so well....alas, due to the BPA chemical leaching issue, I switched to powder again. I hope they switch to BPA free containers.