I recently tried them on a long trip of about 1300 km.
They were installed on a 2025 Suzuki Vitara, together with the roof box https://www.skroutz.gr/s/35987359/ArtPlast-Roof-Box-Mpagaziera-Aytokinitou-me-Mono-Anoigma-CHoritikotitas-400lt-Anthraki-BA400.html.
They look very much like, if they aren't identical to, the Menabo Tiger (the box they arrived in had the word Tiger written on the outside). (https://www.skroutz.gr/s/58356977/Menabo-Tiger-Silver-Roof-Bars-Suzuki-Vitara-2015.html).
The differences I've noticed are as follows:
1. The Menabo stickers are missing.
2. The rubber strips that fit on the underside of the bars (to cover the part of the rail that remains empty) are missing.
The second point causes a loud whistling noise from the bars at speeds over 80 km/h.
On my next trip I'll fit the Menabo rubber strip and report back with further details.
Also, the Menabo manual states a maximum speed of 130 km/h, whereas the leaflet accompanying the Carman bars states 65 MPH (~105 km/h).
Personally, I didn't exceed 110 km/h, because the noise from the bars and roof box was very loud and made me feel very unsafe.
Nevertheless, the trip was completed without any problems.
Partway through the trip, I tightened the bars again (also recommended in the manual); they did indeed need tightening again.
I've written a detailed review of the roof box mentioned above, which is available.
In the review of the roof box, I note that it was installed on a 2010 Mazda 3, with Hermes GS2 bars.
The difference in noise was huge.
In the Vitara, the noise started at 80 km/h and at 100+ it was (at least for me) alarmingly loud.
I used to travel at 120 km/h very comfortably in the Mazda and could have driven faster.
The noise may also be affected by the car's aerodynamics.
The Menabo manual states that noise is reduced if the bars (and the roof box) are fitted further back on the roof.
On my next trip I'll fit them further back, since the first time I couldn't calculate the position precisely enough to prevent the roof box from touching the Vitara's antenna. Update 09/2026: The bars cannot be fitted further back because the Vitara's roof slopes downward from front to back, causing the roof box to slope as well. To keep the roof box level, or at least slightly lower at the front (so that when the car and roof box are loaded, it becomes level), the first bar must be fitted no more than 20 cm behind the front windshield. The rear bar must be fitted 70 cm from the front one (which is also the minimum possible distance between them).
The plastic end caps fitted to the ends of the bars go on and come off very easily. The corresponding Menabo caps seem to lock in place more securely.
To make sure they wouldn't come off during the trip, I put masking tape on the ends of the bars and then fitted the plastic caps, which went on quite tightly.
Overall, for occasional use 2–3 times a year, the bars do the job and prove to be good-quality and safe (taking into account the limitations stated in the manual).
They are also very quick and easy to install and remove using the Allen key included in the package.
Considering their purchase price (€85), I think they were a pretty good choice.
Note: To read the leaflet that comes with the bars, you'll need either very good eyesight or a magnifying glass...
Personally, I took a photo of it with my phone and then enlarged the image.

Update 09/2026
See above for the recommended position for installing the bars.
With the bars further forward (to get the roof box at the correct angle) instead of further back as I had originally planned, the noise is still very loud. So loud that, personally, it makes me very anxious. On a long trip I took in August 2026, I tightened the bars almost every week (I had them installed for the entire month), and they had always loosened slightly. I tightened them using the Allen key provided, holding it only between my thumb and forefinger to ensure low torque (the manual specifies 5 Nm).
In summary, if I were buying bars again, I would choose something more expensive and from a well-known brand. Not because it would necessarily be better, but because it would meet higher safety standards (like the Menabo bars, which specify a maximum speed of 130 km/h), and that would make me feel safer.
If anyone has more extensive experience using these particular bars, please share your insights.