Vacuum brewing is a blast!
It may take some trial and error at first, but the high quality of the resulting brew more than rewards your persistence in getting your technique just right.
The Yama TCA-3 was the second coffee siphon I purchased.
The first was a Hario Nouveau 5-cup model. While the build and glass quality of the Yama can't hold a candle to those of the Hario, that was to be expected, as the Yama is about half the price. More importantly, the Yama does make a great cup of coffee.
From a tactile standpoint, the Hario feels better in the hand and seems more solid; the Hario Nouveau's rubber seal between the top and bottom globes is of much higher quality.
Why didn't I buy another Hario, then? Hario has stopped importing them into the U.S. While they can be found occasionally on eBay or bought from vendors in Canada, the availability of parts is a potential concern.
The Yama, at its much lower pricepoint, is a perfectly adequate entry-level vacuum brewer and a reliable "daily driver" coffeemaker.
As such, I definitely recommend it for someone on a budget, or someone who wants to try vacuum brewing for the first time but is reluctant to spend over a hundred dollars on a Hario (or significantly more than that on a Cona).
Don't be surprised if the bamboo stir stick described in the ad doesn't arrive with the brewer: there was no sign of it in my package.
On a side note, if you find you enjoy vacuum brewing, I would highly recommend getting a butane burner to replace the included alcohol burner: the butane flame burns cleaner and hotter.