My ratings and experience for this printer come from my use of it over the past 3 months. I have to mention the price first, the old saying "you get what you pay for" certainly is true, but this printer breaks that stereotype. Having used only a few printers, and research a handful more I can see why people love this printer, for the price and type of building material ( UV resin) it certainly is worth every penny, I paid 500 for mine but the prices vary from marketer to marketer.
If money's tight and you definitely need a dlp resin printer I would definitely recommend this one.
All that being said, there is space for improvement, the software works great, there are actually 2 options, one is Creation workshop, which is the first recommended software, the second is Nanodlp, which is a program to be used with a raspberry pi 3, different style but seems to work similarly to creation workshop. Unlike other printers which works with most older computers , to a limit of course, the D7 REQUIRES an HDMI output from your computer, so if you don't have an extra few hundred bucks or so laying around for a brand new pc with an HD MI output then you can settle for the raspberry pi for $35 and install nanodlp (which is what I did) , now I know this may not make most people happy but the main advantage of using the raspberry pi 3 is that itsomething wifi capabilities allows you to put the printer in a whole other room or part of your building, as some resins may have a strong smell. Not only that, it also frees up your computer from running the printer while doing other tasks.
All in all its great, I've had all successful prints so far (about 10 prints) but it varies, from the large group of wanhao d7 users on Facebook this can been seen, as the group is very large and is always active with post of successful and unsuccessful prints, reviews, comments, support, suggestions and tips are abundant there. Most problems with prints usually come from the resin profile data put into the printer program, or resins that are not compatible as this is a different technology than SLA printers. It is compatible with most printer resins, but just make sure before purchasing, to save time and trouble.
If you do purchase this printer I wish you best of luck, and please check out the facebook page, it's very helpful.
(P.S. the version printer I have is the wanhao d7
V1.4, I can't vouch for an earlier or later model, although just as v1.4 was better than v1.3 I assume the same would be for the v1.5, but again I haven't used or reviewed those, so I can't vouch for them.)