I'd like to share my experience with Prodeco bike, this information might be useful for prospective buyers.
Prodeco comes with the engine mounted - no need to assembly in your backyard.
I bought "Folding Prodeco Mariner 2012" and now it has been used for more than one year.
During this year I had the following issues:
1. The kickstand was not properly attached to the bike frame - it was moving little bit. Pretty soon it fell down and since the rider didn't pay attention to collect it from the road, I had to buy a new kickstand. This was not an easy task since most of after market kickstands would not fit (they would touch either the disk brake or the pedal, or being too tall). Finally I was able to find a good sturdy one at "E-Cycle Electric Vehicles" - I had to pay CAD40.
2. The battery pack is supported by two aluminium bars. In few months one bar broke. Being in warranty, I send an E-mail with a picture and they sent me new bars. These aluminium bars are breaking periodically due to fatigue. Today (after more than one year) they broke again. See attached "Broken bar" picture:

These bars break near the end:
View attachment 1
I think they need to re-design this part.
3. After one year of moderate use by a light rider the saddle looks like this:

4. After few months the engine stopped working. After I sent back the engine (I paid shipping), it proved that the engine was OK but the controller was broken. They sent me a new controller and the engine was working again. The controller is placed near the battery. It seems that they used SMD technology on their PCB instead of Through-hole technology. I am afraid that SMD is prone to defects on vehicles (due to vibrations).
5. I am not sure if this is bad or not but it looks like the battery pack is not placed symmetrical (and cannot be adjusted due to aluminum bars I mentioned at point 2 above):

It looks tilted to the left.
6. This is a foldable bike - the handlebar can be twisted in order to "pack" the bike. Several times the rider compained that the handlebar twisted while riding ! The locker looks quite flimsy compared with a Dahon folding bike which I had before.
Prodeco comes with the engine mounted - no need to assembly in your backyard.
I bought "Folding Prodeco Mariner 2012" and now it has been used for more than one year.
During this year I had the following issues:
1. The kickstand was not properly attached to the bike frame - it was moving little bit. Pretty soon it fell down and since the rider didn't pay attention to collect it from the road, I had to buy a new kickstand. This was not an easy task since most of after market kickstands would not fit (they would touch either the disk brake or the pedal, or being too tall). Finally I was able to find a good sturdy one at "E-Cycle Electric Vehicles" - I had to pay CAD40.
2. The battery pack is supported by two aluminium bars. In few months one bar broke. Being in warranty, I send an E-mail with a picture and they sent me new bars. These aluminium bars are breaking periodically due to fatigue. Today (after more than one year) they broke again. See attached "Broken bar" picture:

These bars break near the end:
View attachment 1
I think they need to re-design this part.
3. After one year of moderate use by a light rider the saddle looks like this:

4. After few months the engine stopped working. After I sent back the engine (I paid shipping), it proved that the engine was OK but the controller was broken. They sent me a new controller and the engine was working again. The controller is placed near the battery. It seems that they used SMD technology on their PCB instead of Through-hole technology. I am afraid that SMD is prone to defects on vehicles (due to vibrations).
5. I am not sure if this is bad or not but it looks like the battery pack is not placed symmetrical (and cannot be adjusted due to aluminum bars I mentioned at point 2 above):

It looks tilted to the left.
6. This is a foldable bike - the handlebar can be twisted in order to "pack" the bike. Several times the rider compained that the handlebar twisted while riding ! The locker looks quite flimsy compared with a Dahon folding bike which I had before.