I was looking at every review possible and YouTube tutorial to try and find something to use on my camel colored Midori Traveler's Notebook that wasn't going to darken the leather color into a medium or dark brown. I finally decided to try using this because I was already planning to keep it and use it on my Saddleback Leather desk pad anyway to condition it. On the label for this bottle, it does warn you that it may darken lighter colored leathers and to test in a discreet area first. I decided to take a chance and use it on my small passport notebook since I didn't really care as much about the outcome on that notebook as much as I do on my larger one. (I apologize that the photos may be slightly blurry as I was trying to take the photo with one hand while holding the journals.) These photos were taken during the day 24 hours after when I applied the product onto the notebook by a window with natural light but not direct bright sunlight. The larger regular sized camel notebook in these photos are WITHOUT any treatment at all (how it normally looks when you first receive the notebook). Main thoughts: It conditions the leather nicely. I feel like the texture and feel of the leather is the same if not maybe just a bit softer with the conditioner compared to without conditioner. You can see that on the front of the journal the difference between the two journals is barely noticeable. However, on the back of the journal there seems to be a more noticeable difference. From what I can see in person, it doesn't look darker as if it is turning into a dark brown color - but it looks warmer-toned. I'm not sure why that is - whether it's because of the leather itself since it's a natural product or how I rubbed the conditioner on it. If I lay the passport flat, it doesn't look like there is any difference between the front and back cover. I used this stuff VERY SPARINGLY because I was worried about whether it would significantly alter the color. I barely used a quarter-sized amount for the entire passport notebook and was very careful to evenly spread the conditioner on the applicator pad first - making sure that the conditioner absorbed into the pad FIRST before rubbing it onto the notebook. If you put too much of this on the leather, I think it WILL make the camel color significantly warmer toned and potentially if you put way too much on, it MAY darken the color significantly. I noticed on the applicator pad that some of the color of the notebook came off on the pad but nothing too extreme that is worrisome. It's to be expected for leather products. Overall: I think this is a good leather conditioner overall and I do plan to use it for other purposes like I mentioned before. BUT, if you are planning to use this for the camel traveler's notebook and you are 100% adamant about keeping the color EXACTLY as how you first received it, I can't fully recommend this product because as of 24-hours after application, I do see a very slight difference in the tone of the color. It's not for the worse (thankfully) in turning into some really dark brown shade, but there is a warmer tone to it for now. Most conditioners will alter the color of the leather slightly when you first apply the product since it's wet so I don't know if the notebook will return back to exactly how it was and be identical to my larger traveler's notebook in a few days (it's only been 24hrs so far). I will try to remember to come back to post an update if there's been any significant changes later on.