I've had a 3LT Brian Evo 2 tripod for a little over a year. Frankly, I purchased it on a whim, but it has worked out fine as a compact travel tripod. I read generally positive reviews on the tripod before I bought it and I've personally not experienced any problems, camera shake or blurry photos that could be blamed on the tripod, even when the center column is extended. That said, I also haven't used it in challenging situations, such as trying to set-up shots in the ocean, running streams, or very windy conditions. Nor do I use it with anything longer/larger than my 70-200mm lens. When possible, I do try to avoid extending the center column, especially when using it with a heavier lens.
What mainly attracted me to the 3LT was the fact that the folded length and packing diameter were smaller than my Feisol tripod, and in a pinch, I can also use one of the legs as a monopod. Also, I thought it looked pretty cool.
Would I rather have a Gitzo or RRS? Sure - from what I've seen, the quality, particularly with the RRS tripods, is undeniable better. But I'd also have to pay 2-3 times more and I'm just not able to justify the additional cost. For what I shoot and the lenses I currently have, the 3LT currently works fine as a travel tripod. If I want a bit more stability and have room in my bag, I'll go with my Feisol (which is also a great tripod). Of course, if the 3LT tripod somehow fails or breaks in a few more years of use, I may change my mind. But if that happens, I'll also have the justification I need to get myself an RRS 
Hope that helps.