Since this is a tiny quadcopter, we'll go with a micro-review and let others add to this thread. Appeal to users: Advanced Beginners UP who have interest in miniaturization, indoor flying and/or hacking and upgrading it. Type of Quad: Consumer / Hobbyist Cost: < $45 with built-in battery, spare props, charger and Receiver. Crashworthiness - Good Range - as far as you can possibly see it....this quadcopter should be flown within 20-30 feet of you or you will certainly lose it. Estes, as many know, are well known for their model rockets. I built and flew them in the 1960's and many other hobbyists got their start with model rocketry. My guess is that they looked at the budding R/C quadcopter market and decided to jump in - but with something a little different. Their new offering, the Estes Proto X Quadcopter, is really tiny...a good bit smaller and lighter than the current crop of micro-copters. But how small is too small? And is small good? Why? OK, so here is the quad both in the box and then out - with some items for size comparison - click on the pics for larger images. I purchased mine from Amazon at this link. The quadcopter sells for about $40 and includes everything shown here. All you need to add are the two AAA batteries for the TX - you'll need a small phillips screwdriver to open the TX and put them in. The LiPo battery is built in - that means you can only fly once in-between each charge. Yes, hackers have already started modifying this copter and using replaceable batteries, but since we are a site for beginners, our review will focus on the stock experience. The weight of my quad - with battery - is 11.2 grams. Charging time varies - reports have been coming in that charging can take from 15 minutes (or less) to as much as 30 minutes. Mine seems to take toward the longer end - maybe 25 minutes. Flying time is about 3.5 minutes, which is quite a bit shorter than other micro or mini quadcopters. I've charged the battery at least 6 times and checked the voltage of the charged battery and the USB charger. Both are correct at 4.2v. I timed my flights and have not yet got more than 3 minutes before the warning (low battery) lights come on - and about 3.5 minutes total. These flights have been simply hovering and a bit of back and forth in a 10 foot square area, so not taxing on the batteries. On my first couple of flights, it took the entire run of the battery to get the quadcopter trimmed correctly. The TX only has 2 (as opposed to the usual 4) trim adjustments, so it takes some guessing as to how to trim it correctly. Given these limitations, you may start to wonder what need this quad serves? I am asking myself the same questions but also trying to be fair to the designers and the manufacturer. So far I have only a couple flights under my belt, but my initial impressions are these. This is not a quadcopter for beginners - that is, it should not be your first quadcopter. The reasons will be spelled out later in this review, but in summary I think most newbies will get frustrated with the short flight times, the difficulty in trimming and other factors. Given the difficulty of trim as well as the lack of crash protection, the small size does not add any value to this craft. That is, it is not possible to easily fly this in smaller areas than the next size up in quadcopters (Hubsan Quads X4, etc.)...more later. Estes (l) and Hubsan Quads X4 Small Problems with my unit My USB charger stopped working after the first charge. A closer inspection revealed that the copper contacts inside the charger had bent back and were not contacting the charge strips on the quad. I had to perform some major surgery to make it charge again, something which would anger most customers. I suspect the design of this mating system could be improved and/or the QC stepped up in this (and other) areas. My Proto occasionally fails to bind....although it turns on and appears to bind (lights on quad stop blinking), the TX will not operate the quad. Turning the Proto off and on again and rebinding has fixed this problem so far. As with many of these small quads, the propellers can fall off very easily - and, with such small props, your chances of finding them are diminished. A spot of elmers or similar glue on the prop shaft (remove and re-install props) should help this. Binds to Hubsan Quads X4 TX The little TX is cute, but a larger TX with longer sticks feels better in my hands. Luckily, the Proto binds directly to TX's using the Hubsan Quads protocol...and since I have an X4 in the stable, I'll be using that to fly mine after the initial test flights. The Hubsan Quads also allows for more trim options (4 instead of 2), so perhaps this will allow a better state of trim.