I bought one. Don't know if it was connex or not, but was china made originally shipped here to the states.
It is a one tripper, in really good shape. I've had it for 5 years now.
These container's do require maintenance. Power washing the roof of built up residues and leafy matter is primary. Repainting both exterior, and interior surfaces does become necessary to extend their longevity.
My next plan is to install some inexpensive(but is still overpriced lately) galvanized corrugated roofing at a 4-12 pitch on top of it to shed the buildup of organic matter, pooling water that accumulates on top of it that causes the factories paint to fail, and provide an extended sheltered access area beneath the open door's area. The new shed roof atop will also allow, re-direct, rain/snow to fall outside of the exterior walls, and not down them. The cheap paint they come with mostly only lasts for ~ 5 years, or less, before they start to rust up from the elements if not maintained. I had a chance to buy an older one for 3/4 less, but was not happy with just two vents, exterior/interior rusting, and longevity of them.
Go with the lesser if You only plan to have it for a few seasons.
Mine has not leaked, and still seals properly. Beware they do/can accumulate condensation within. I paid $4200 for the one I have now, and it is worth every penny worth IMO. The one I have is of the newer designed 20'er with four vents, instead of the older styled 20'ers that only have two vents. Older styles that have had more than two roundtrip's are considerably less money, but often have dents, scratched paint, and compromised hardwood flooring.
Best part of these container's is, no more field mice getting into stored belongings and ruining them !!!
My towns regulations considerate it a portable structure, and do not require payment of taxes upon it to have it on the property.
Check your local codes to see if You will get taxed upon it, before getting one. I know if I "built/bought" a shed, or even just a shed roofed, with no walls, with more than 140 square feet, it's considered taxable, and will raise the property's taxable rates.
I used to sell portable garages, and still have two of them. One is 12X20X8'H, the other 14X24X10'H. Ironically one of the covers lasted 10 years, and the other 17 years! They both were only rated to last 5 years each. They do last much longer being in a shaded area, versus constant exposure to direct sunlight. The prices how ever have gone way up in recent years, and the availability of them can be scarce. Both have survived many hurricanes and decades of snow loads. I've found a key is to leave the end panels unzipped to allow the positive pressures of strong winds to be mitigated, and not turn them into "kites". They used to be a cost effective solution to keep snow and rain off outdoor equipment, cars, and boats. They both paid for themselves within 3 years of ownership versus a pre-built or owner built "shed". Which may, or may not, apply to an individual's given circumstances.
GL