I bought this from Toys”R”us.  For $25.00 it is not a bad deal. It does not come with any engines though, but the pad and controller. I plan on using the Amazon as a replacement for the Helio-copter booster, ie, I plan on using the nose cone from the Cosmic Cobra on it. Actually, the nose cone itself IS the same cone on both. The Cosmic Cobra simply has the heli-blades that are glued on to it.

I now have three of these sets. They were a web only special on toysrus.ca, got them for $9.99 each set.

This is part of the Tandem X starter kit.  It also comes with the Crossfire ISX rocket.

The Tandem-X Launch Set offers Xtra value with two rockets. The Crossfire ISX is a Skill Level 1 rocket that streaks over 1,200 feet into the sky, and the Amazon is an E2X rocket that flies over 600 feet.  The Tandem-X Launch Set includes a launch pad and launch controller

Recommended engines: 1/2A6-2,A8-3,B4-2,B6-2,B6-4,B6-6,C6-3 or C6-5

Specs. for the Amazon:
Length 33.6 in
Diameter 1.35 in
Weight 3.4 oz
Recovery 18 inch parachute
Max Altitude 650 feet

Recommended engines B4-2,B4-4,B6-2,B6-4,C6-3 or C6-5