I haven't tried that one, but I have the 36v one with the other frame. It's very weak on power. The one you mention is only 24v, so won't be any better. I modified mine to make it into a much better ride. Also, yours has rim brakes, which work, but cause too many issues on an electric bike unless you're very light, but on the plus side it's not quite as heavy as mine. It's a shame you weren't able to get one like mine, which was only £245. Ghost 1951 loves his, but he only weighs 74kg. He made a thread about it too.
Mine came today. They gave me a 2hr delivery slot yesterday, then I got a 15 minute warning, then a 5 minute one, then they delivered it on time. 10/10 for delivery, like the last one. There were copious amounts of bubble wrap all over it, which was a pain to untape and remove. Again, one of...
www.pedelecs.co.uk
I have ridden mine 434 miles so far and having swapped out the brake calipers for hydraulic cable operated ones ( as researched and detailed by Saneagle) I have no complaints at all about it - albeit that it is not a speed machine having only 8 amps @ 36 volts max power input to the motor. This means I am probably only getting a max output power of about 236 watts. Up hills, you need to work hard on the pedals - but heck - it's an assisted bicycle - not a motor bike so hard leg work is part of the package. That said - I would hope the 24 volt Argos bike purchased by the OP has a controller with a max input greater than the 8 amps that mine has, otherwise he will be in for a fair bit of personal effort on a hill climb. As has been pointed out 24 volts at 8 amps is not a lot of assistance.
As Saneagle says - I really like mine, but as in everything, it is a matter of horses for courses. Heavier people or those with a health issue might find the bikes that Saneagle and I bought, rather weak. Others - like me will just jump on it and do a quick run to the shops or to visit a friend and enjoy every bit of the experience. It weighs a solid 28 kilos - made of girders by the feel of it, but my only annoying failure (besides the power switch) was when one of the very cra ppy plastic pedals snapped off, leaving me only with the steel shank that screws into the crank arm. To be fair - the pedal had been abused when the bike fell off its stand at around 100 miles, so it may have been cracked by the blow.
Now the cold weather has come, I am noticing some battery sag on hills at about 12 - 15 miles from charge that was not noticed during the summer. I think the battery cells are OK, but it is only a 10s 3p format. When the time comes to replace the battery, I will go for a much higher capacity. The space inside the battery case is much larger than needed for the current small battery. I could easily go for a 4p configuration inside that space. I opened the case to deal with the failed power switch, which had failed in the 'ON' position on the first day I had it. I squirted WD40 into the switch and it flicked back into a functioning condition straight away and has not misbehaved since. I think Saneagle's bike had the same issue.
I fitted a cheap bike computer to measure speed and distance and accurately calculated the wheel circumference. The mid speed position cuts out at 11.6 mph and the high speed one at about 15.5 mph. To be honest, the bike rarely gets past 15 miles an hour without my putting in a good effort. It won't ghost pedal to the legal max and motor cut off. It's not powerful enough even with a 74kg rider on the flat.
Overall - I am delighted with the bike because it suits my needs and it was the best bargain of the year for me at £252 delivered.