Other than the “Do you really just grow ‘strawberries’ in your grow box?” question. The most common question I have gotten is why exactly do I have a grow box. Hopefully I will be able to answer this question below, as for the first question the answer is yes (without the fingerquotes)
Necessity: I am cheap and don’t want to buy all my plants from local nursery or garden center, but do not have a good location inside my house to grow seedlings with a normal table/shelf light setup. I definitely do not have the space to setup a greenhouse in the backyard. This unfortunately forces me to do my growing in my cold windowless garage. Using a grow box allows me to maintain a safe temperature for my plants no matter what the conditions are outside.
Control: I have nearly complete control of the conditions inside the grow box. I can provide my plants with the perfect temperature, humidity, lights (intensity and wavelength as well as day/night simulation) and even can simulate a slight breeze using a small fan if desired. This gives me many advantages which I would not have even if I could grow indoors. One example of this is growing peppers, which can be fairly difficult in our climate but with some modifications settings in the grow box can create the perfect conditions for it.
Saving Money: Given my options such as the $20 PC Grow Box and my $6 Christmas Light LED Grow Box the cost of entry is pretty low. You do have the expense of lighting the thing but given the 48 watts required for the PC Grow Box and 10 watts of the Christmas Light LED Grow Box even those maintenance costs are reasonable.
Portability: All three of my grow boxes (PC Grow Box, LED Grow Box, Computerized Grow Box) all have a single plug that goes into the outlet and can literally be picked up and moved to another location if needed (try doing that with your greenhouse)
Scalability: Need more space in your grow box? As little as $6 can get you a new one, or $10 worth of lumber can double the size of your existing one (assuming your old lighting can support the space) You are limited to what your creativity can imagine.
Fun: Call me crazy, but I like the idea of tricking my strawberries that it is a nice spring day and get them to start blooming and producing fruit. If all goes well I can move the plants outside during the real spring and get even more harvest while freeing up some space for more plants.