Hey guys.......EXI-450 (plastic version....$99 before ship) review:
I just finished building it last night and did a test hover in the basement today.

*motor...Danlion 3500KV
*ESC....Dynam 30a
*Gyro....Telebee with drift and temp compensation circuitry
*servos...E-Sky std 8g (x4)
*battery "zippy" 2200mAh 20C
*Radio system DX7 with AR6100E RX
All the above are new out of the box/package

First impression....I thought the tail rotor gearbox was a bit "cheap looking" and I really questioned the way it clamps to the boom without a position locking lug and I thought that MIGHT be an issue. I did change the allen screw out on the clamp to a higher quality screw, it locks securely and position change is not an issue unless you crash or land pretty hard. I also thought the plastic in general was a little lacking in quality but hasen't offered to be a problem as yet. The horizontal and vertical stabs....replace them with T-Rex stabs ASAP or at the first opportunity...physically too small for a 400 heli. The flybar paddle....I recommend changing them to Align 8G paddles as well as installing Align stock skids.

The build:
It took a couple hours to assemble. They give you a lot of extra hardware and there is NO instructions I could find in the box, the extra hardware is useable, but confusing during the build, but it's a basic 400 sized heli....not a problem. Installing the servos was a bit of a PITA...pretty tight in there (LOL). I placed the gyro dead center under the main rotor mast and I had to invert it and it faces rearward, but it's fine. Routing all the wires was pretty straight forward, the ESC and RX are mounted to the frame on the (outside the frame) side rear panels (gonna put a scale fuse on it later). I like the battery tray provided...well placed and thought out. You have a choice to put the battery on the upper slant tray or in the lower flat tray...I chose the lower tray.

Set-up: Took some time, but it normally does. I'm still pending some minor mechanical trim changes to the rudder and ailerons to get this bird zeroed out. The pitch settings in the head...you really gotta go through that. The initial was about 6 or 7 deg down at full stick down on collective. I did of course have to raise the swash quite a bit mechanically.

Test flight:
Other than the trims being a little off mechanically, no probs. VERY powerful, stable, and predictable. I had to tone down the throws on the servos and the D/R because it's VERY responsive to input. In the right hands...this bird is capable of 3d pretty handily right out of the box. The stock blades did NOT need balanced and are 325mm. The test flight went VERY well, and it's gonna take some time to trim 'er out.

Overall opinion: A great value with a good degree of quality. Don't skimp on any of the electronics/motor. I equiped this bird with pretty good stuff that is known to be reliable. Worth the $99 plus ship? You betcha.