They've been pushing the product alot on various boards. It's a good price for a basic scanner, however keep in mind it currently does NOT support the GM Enhanced parameters. (such as Knock Retard)
From another website here are the parameters it supports (some are vehicle dependant and not supported on GM vehicles, example Wide Range O2)
Fuel System Status
Calculated LOAD Value
Engine Coolant Temperature
Short Term Fuel Trim (Bank 1)
Short Term Fuel Trim (Bank 2)
Long Term Fuel Trim (Bank 1)
Long Term Fuel Trim (Bank 2)
Intake Manifold Pressure
Engine RPM
Vehicle Speed
Ignition Timing Advance
Intake Air Temperature
Air Flow Rate from MAF
Absolute Throttle Position
O2 Sensor Voltage (B1, S1)
O2 Sensor Voltage (B1, S2)
O2 Sensor Voltage (B2, S1)
O2 Sensor Voltage (B2, S2)
Commanded Secondary Air
Location of Oxygen Sensors
OBD Requirements
Power Take Off (PTO) Status
Time Since Engine Start
Distance Traveled With MIL
Commanded EGR
Commanded Evaporative Purge
Fuel Level Input
# Warm-Ups Since DTCs Cleared
Distance Since DTCs Cleared
Barometric Pressure
Control Module Voltage
Absolute Load Value
Commanded Equivalence Ratio
Relative Throttle Position
Commanded Throttle Actuator
Minutes Run While MIL Active
Time Since DTCs Cleared
Evap System Vapor Pressure
Ambient Air Temperature
Absolute Throttle Position B
Absolute Throttle Position C
Absolute Throttle Position D
Absolute Throttle Position E
Absolute Throttle Position F
Short Term Fuel Trim (B1, S1)
Short Term Fuel Trim (B2, S1)
Fuel Rail Pressure
Short Term Fuel Trim (Bank 3)
Short Term Fuel Trim (Bank 4)
Long Term Fuel Trim (Bank 3)
Long Term Fuel Trim (Bank 4)
Fuel Pres Relative to Manifold
Fuel Pres Relative to Atmosphere
O2 Sensor Voltage (B3, S1)
O2 Sensor Voltage (B3, S2)
O2 Sensor Voltage (B4, S1)
O2 Sensor Voltage (B4, S2)
O2 Sensor Voltage (B1, S3)
O2 Sensor Voltage (B1, S4)
O2 Sensor Voltage (B2, S3)
O2 Sensor Voltage (B2, S4)
Short Term Fuel Trim (B1, S4)
Short Term Fuel Trim (B1, S2)
Short Term Fuel Trim (B2, S2)
Short Term Fuel Trim (B2, S3)
Short Term Fuel Trim (B2, S4)
Short Term Fuel Trim (B3, S1)
Short Term Fuel Trim (B3, S2)
Short Term Fuel Trim (B4, S1)
Short Term Fuel Trim (B4, S2)
Wide Range O2 Current (B1, S1)
Wide Range O2 Current (B1, S2)
Wide Range O2 Current (B1, S3)
Wide Range O2 Current (B1, S4)
Wide Range O2 Current (B2, S1)
Wide Range O2 Current (B2, S2)
Wide Range O2 Current (B2, S3)
Wide Range O2 Current (B2, S4)
Wide Range O2 Current (B3, S1)
Wide Range O2 Current (B3, S2)
Wide Range O2 Current (B4, S1)
Wide Range O2 Current (B4, S2)
Catalyst Temperature (B1, S1)
Catalyst Temperature (B2, S1)
Catalyst Temperature (B1, S2)
Catalyst Temperature (B2, S2)
Equivalence Ratio (B1, S1)
Equivalence Ratio (B1, S2)
Equivalence Ratio (B1, S3)
Equivalence Ratio (B1, S4)
Equivalence Ratio (B2, S1)
Equivalence Ratio (B2, S2)
Equivalence Ratio (B2, S3)
Equivalence Ratio (B2, S4)
Equivalence Ratio (B3, S1)
Equivalence Ratio (B3, S2)
Equivalence Ratio (B4, S1)
Equivalence Ratio (B4, S2)
Wide Range O2 Voltage (B1, S1)
Wide Range O2 Voltage (B1, S2)
Wide Range O2 Voltage (B1, S3)
Wide Range O2 Voltage (B1, S4)
Wide Range O2 Voltage (B2, S1)
Wide Range O2 Voltage (B2, S2)
Wide Range O2 Voltage (B2, S3)
Wide Range O2 Voltage (B2, S4)
Wide Range O2 Voltage (B3, S1)
Wide Range O2 Voltage (B3, S2)
Wide Range O2 Voltage (B4, S1)
Wide Range O2 Voltage (B4, S2)
It'll scan any standard OBDII items, but not the enhanced at this time (I broke them up , first part are items I believe our cars use, 2nd list are items I don't think our cars use)