Marc pretty much nailed it on the head.
I would also add
While its certainly better in terms of front end filtering, these still use direct conversion stuff which suffers quite a bit when the RF space gets crowded.
Yep, they are supposed to be competition to Motorola, they are supposed to be "good", but its fairly clear that they had some shenanigans with Motorola, including stealing Motorola patents, which they were forced to remove by court, and (my personal opinion) most likely they stole Motorola technology too. I simply won't support a company that steals, or is suspicious of stealing, tech from another company, then cutting prices b/c of the free hitchhike in tech they got from the technology theft.
To reiterate, I would only consider purchasing any of the ones in Marc's list for non mission critical roles.
Again, buy these radios with the knowledge of what you're buying. I own a bunch of BF-888s for house intercom, range is about 1/5th of a mile before you can barely understand the other person.
For high power application, make sure you get FCC type certified equipment... nowadays there is plenty of surplus commercial gear that will work wonderfully, Motorola, Kenwood, iCom, Vertex, etc. Why? b/c if your neighbor TV starts to develop glitches, and he (or she) traces it back to you b/c your cheapie is spewing 50 watts of all kinds of dirty harmonics and messing with his Superbowl game, etc, he/she could easily file an online FCC complain now, and while 1 complain might not spark FCC wrath right away, two or three in quick succession certainly will, and then, when the FCC comes down on you it probably won't be pretty. Again, in radios the motto of "you buy cheap, you buy twice" also applies. If these BTechs were that great, police and firefighters will use them, but they don't.
As a final note, considering the amount of money you will end up spending on a decent GMRS setup, saving 50 bucks on your first radio is nothing. A decent GMRS setup (with radio range measured in miles, rather than in inches), with radios, feedline, connectors, filters, duplexers, antennas, etc, will end up costing you almost a thousand dollars.