Nothing like expected. If there is no visual contact, it's not worth it. Of course, if there was visual contact, all this wouldn't be needed

The cable it comes with (RG58) is useless for the frequencies used by 4G+ mobile telephony. It definitely needs to be replaced with a 5mm low-loss cable for the 2.5GHz range. The antenna is a Log Periodic type (Logarithmic Periodic). After replacing the RG58 with ENVIROFLEX B-142, 7m long, the differences were not as expected. I will try changing the position and report back.

Finally, today (10-04-2024), after countless tests and changes in position and height, I decided it is not worth it at all. Single-channel panel-type antennas do a better job. Note that I do not have line of sight to the cell tower, which makes the measurements more reliable and much more critical. Even with the use of a Spectrum Analyzer, there were no indications to justify the cost. Maybe if there is line of sight to the tower it would perform differently, but I still doubt it.

Finally, today 16/04/2026, one of the two antennas broke at the mounting point with the mast, showing that the material and construction are poor. I threw both away—money, effort, and hopes lost.

Distance from the cosmote tower 3.2Km.
With one antenna (siso-miso) the router locked at about 80Mbits down 30Mbits up.
With two antennas (2x2 mimo) it locked above 150Mbits down 40Mbits up.
The Poles have done a good design and the product is worth the money. As for the build quality, they have used cheap materials compared to much more expensive antennas, (we still do not know the durability of the plastic cover of the antenna in weather conditions).
The RG58U that comes with the antenna is useless for 900MHz due to excessive losses of 16.5dB/100ft.
So, when the antenna system is raised higher (11m) to have a line of sight with the tower, we will replace the existing coaxial with the LMR400 (3.9dB/100ft) and we believe that with this combination we will manage to reach the max of LTE 4G+.

10/08/2024
Two years have passed since the initial installation, during this time we cut the RG58 to 10 cm and put a female N connector on it, we connected it with the LMR400 N male - SMA male and raised the antenna system to 11m, so that it has line of sight with the tower. The result was as expected, and the plastics withstand the summer sun and the dry winter wind so far. The 4G+ works seamlessly 24/7 all year round and is locked at 220Mbits downstream, signal strength 100%, RSRP -79dBm, RSRQ -15dB, SNR 29.6dB.