Bought this to replace my CST Berger transit level. This instrument is easier to setup and has a clearer and stronger lens. The inclination and protractor dials are very clear and easy to reference. My only improvement would be that the sight barrel included azimuth gradations, but it doesn't.

First, I set out to get a reference point off of my back, left boundary stake. To do that, I started at a known stake, took 8 turns down a trail through the woods, and distance measurements totaling about 400ft to arrive at the back, left stake. Using a tool I wrote to do the calculations, I determined the exact angle of my last segment arriving at my destination.
Having an angle and a starting point, I surveyed another trail that led to about where I thought my back, right stake (the ultimate goal) should be (based on GPS). That survey involved 6 turns and 270 ft through dense foliage. I discovered that my GPS estimate was way off, and the stake I was looking for was buried. However, using this transit and a 100ft tape measure, I got within 12 inches of the lost stake! I could never have found that stake in the dense undergrowth without knowing almost exactly where it was.
I am so happy that I was able to find a boundary stake that I've been passively seeking for almost 30 years.
I wrote a piece of software that I could use to enter my measurements, which would compute and graph my path based on the angles and distances I entered. I'm happy to share my survey tool, if anyone is trying to do something similar. I'm also putting together an instructional video.
I am very happy with this transit.

I was a little worried about buying this transit because someone said in a review that there was excessive backlash in the tangent screws, this is not true, there is a spring that keeps pressure on the tangent screw so there is absolutely no backlash.

I used the transit to flag for a 1280' long fence with a hill in between. There were 3 survey pins, one at each end and one 400' from one end, The wife and I were able to align from one end to the 400' pin, pivot up the hill about 800' and set a pin at the top, then using a 16' pool vacuum handle set another pin about 75' over the hill. We then moved and reset the transit on the other end survey pin and aligned with the 2 pins we had set, the fence came out perfectly straight.

The optics were easily able to focus on a piece of 1/2" conduit painted orange and the pool vacuum handle at 800'.

I am very happy with the performance of this transit for the job I was doing and the price was less than a surveyor, but if you need to read precise angles vertically or horizontally you should probably spend more and get a better transit.

Read all the reviews on this product. Was on the fence about yes or no. Some were talking cheap plastic case, bent adjustment screws, bad packaging Etc... Don't know why they had these issue, because the case is the same plastic as other use. Came in the case perfectly set in foam, with no bent adjustment screws at all. I work heavy construction, and needed something simple with an affordable price. This was it!!!! Great product so far & I would buy another if I need one.

This meets my needs for a DIY transit with adjustment in both the vertical and horizontal planes. If I were a professional surveyor, I would spend 10x the money to get a highly accurate and precise transit. Since I'm not, I think the price is very good for this item.
I strongly recommend getting a bubble level (such as "High Accuracy 30' /2mm D30mm/1.2" Alloy Metal Shell Bullseye Bubble Level for RV Tripod Ball Head"). I find it much easier to level the transit with a bullseye level rather than the built-in level.
Pro: Reasonable build quality. Simple to operate.
Con: No stadia lines. Horizontal graduated circle is loose (therefore inaccurate and imprecise). Screw lash on horizontal and vertical tangents more than desirable.