Are these Sportcrafters Rollers any good?


http://www.planet-x-bikes.co.uk/i/q/TRSCPRGA/sportcrafters_progressive_resistance_aluminium_rollers?utm_source=The+Planet+X+and+On+One+Mailing+List&utm_campaign=c9c2caf504-MWC_Friday_24_05_13&utm_medium=email&utm_term=0_561486488b-c9c2caf504-271243425
Available for £149.99 - from allegedly an rrp of £300 - anyone used them - opinions?
Felt F70 05 (Turbo)
Marin Palisades Trail 91 and 06
Scott CR1 SL 12
Cannondale Synapse Adventure 15 & 16 Di2
Scott Foil 18
Marin Palisades Trail 91 and 06
Scott CR1 SL 12
Cannondale Synapse Adventure 15 & 16 Di2
Scott Foil 18
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Marin Palisades Trail 91 and 06
Scott CR1 SL 12
Cannondale Synapse Adventure 15 & 16 Di2
Scott Foil 18
Basically they are the same as the cycleops ones (which are easier to find reviews of) just a different colour and sticker
Thanks very much Omar, that I did not know, very useful info :-)
Marin Palisades Trail 91 and 06
Scott CR1 SL 12
Cannondale Synapse Adventure 15 & 16 Di2
Scott Foil 18
The resistance goes from easy spinning to ripping your legs off just by using your gears, I got them to do specific workouts at ftp/vo2 max levels and they are perfect.
To put out 250w on the tacx needed top gear and a cadence of 120+, pretty useless.