Advantages: price. Disadvantages: flimsy tripod mechanism, flimsy fasteners. Small eyepiece diameter. Conclusion: it is very difficult to aim because of the tent of the tripod design, and weak fasteners. The eyepiece is so small that the phone will have a circle of 1 cm, and when viewing the eye you need to constantly find the right position. The Mount of the telescope does not withstand the weight of the phone, but it is impossible to hold the hand and maintain position. I waited until evening, and tried to look at the moon. This is a test, an incredible test to see something in this X ** nude. I 've been trying for an hour to get a stable focused image. In the photo, a 20mm eyepiece with an increase of 1,5 times (+ photo with a filter) is the optimal configuration between magnification and picture quality. Oh, if you knew what those two pictures were. To see something in the X3 tube is simply impossible (without jokes). Just look at the video on yutub "honest review" on this telescope before buying. Those who write that this is a beautiful telescope, they just did not use it. To buy extremely do not recommend. 2-3 times look, and throw in the box. Money to the wind.