I tried Trekk Advantedge series (Espresso) in my recent race, I ran full marathon at TMM 2023 & trekk gels really work well for me. I have tried many of energy gels but something interesting I found about trekk is, I got instant boost after consuming gel within a minute and than any other gels this gels last for upto 35-40 mins whereas other gels last for only 20-25 mins. Not just that but trekk gels are very easy to carry, I also use this gels in my speed training sessions also, also they are not so expensive.