I live in the UK but need a travel router sometimes in the US when staying in hotels that have wired-only networks. So, I ordered this from the US Amazon site on a recent visit there - partly because the price is better than in the UK and partly because I'd get a US power cord rather than the much larger UK one, with which I'd then have to use an adapter. Now I'm back in the UK I thought I'd try it out and I have to say it seems to work well (connected to my home network) and is extremely simple to get working with the default settings. The router itself is tiny - even smaller than I imagined, which is important when travelling.
I would have rated it 5-stars but for two things, which others have commented on:
1. The power-supply is 110v only. This is unbelievable, given that it's billed as a "travel router" and most of the rest of the world uses 220v power. I don't know what made me even check before plugging it in - I could easily have fried it, as these days all devices seem to come with dual voltage power supplies. As others have suggested, I used it successfully with an iPad power supply.
2. The main reason I need wireless when travelling is that I no longer take a laptop - relying instead on my Android smartphone and iPad. Although these work fine with the default settings when accessing the web, e-mail, apps etc., they don't work with the device's own configuration panels. Of course, I can just use default settings, or change the settings at home before leaving - e.g. to configure wi-fi security - but I don't like the fact that once I'm away from home I won't be able to change any settings that I might want to, such as the wifi channel. [***Please note: see my update below - Trendnet seem to have fixed this problem with the latest firmware]
My other small criticism concerns the case that comes with it. I like the fact that it comes with a case but it's rather big and heavy compared to the router itself, undoing some of the benefit of the latter's compactness. To put numbers on this, I've just weighed the various components as follows: TEW-654TR: 53g, USB + ethernet cables: 51g, power supply: 78g, case: 110g. It's a nice solid, protective case, but maybe too good.
Overall, it's a great little product, with a couple of issues that may not bother you at all.
Update April 22nd, 2012:
After writing this, I updated the firmware to the latest level (1.10.12), which was also quite easy to do, and I find that I can now log on to the configuration panels from my iPad. So, well done Trendnet for addressing this serious issue. My only serious criticism now is the single-voltage power supply, which I still find astonishing. All the power adapters I own for cameras, laptops, kindle, mp3 players, iPods, iPads, iPhones, work with both voltages - and none of them have "travel" in their actual product names. Strange.
I'd like to update my rating to 4.5 but of course it has to be 4 or 5, so I think I must leave it as 4.