NetSuite

Help us at a time we were growing the company, so right now we are more efficient and have real time data because of Netsuite.

Great experience overall. Time to implement took 6 months, but could have completed in 4. We waited longer to get system configured to meet more of our needs. Have maintained our subscription since 2013 and really like the ease of configuration and always being on the latest version and can take advantage of improvements without added cost for the most part. The business intelligence and reporting is excellent and it is easy to expand the use of the software and add new companies as business grows.

Very positive, I personally hope to only use NetSuite going forward, as the new releases continue to iterate on features and gets better each year.

Netsuite was chosen by our company around 9 months ago and has been in use since January 2015. Implementation was long process and was expensive. Costs include the purchase of main licence, an expensive per-person licence, paying a consulting firm to run the implementation project and having a dedicated in-house employee as "admin" to support the other users.
Netsuite has brought some great changes to our company and improved our record keeping hugely. It has also brought transparency to many of the processes and highlighted bottlenecks.
There are many downsides however, we have run into a plethora of technical problems with logic and programming along the way, while error messages abound (much to the annoyance and over-work of the consultant's team). All of the glitches have been worked out and customer service from the NS themselves has been extremely fast and professional.
Adding to the downsides, Netsuite is probably the LEAST intuitive system I have used since the 90s. It really seems like it is stuck in the past. There are hardly any icons, no drag and drop and navigation is inconsistent. Additionally, as a general manager, I need to extract information and data quickly and easily, but I cannot. Every time I want to extract data I have to go to our in-house admin for her to "write a search" in a logic/language that took her months to learn. Nobody else has time to learn that, so nobody else can do it. To my knowledge, NS has poor graphing capabilities and is very rigid in that I cannot easily change the way data is displayed once it is graphed. Usually, if I want data and I have not got time to wait for the admin to write the search pattern for me, I just export a large amount of data with a predefined/standard search and filter it and graph it with Excel - but this always begs the question, why are we paying through the nose for a program (NS) that is so difficult to use that it forces me to use another program (Excel) to make up for its inadequacies?
I could go on with the downsides of how unusable it is from a manger's point of view - there is a lot to say, but I think you get the picture.
The biggest downfall of Netsuite for me is that it is so hard to use that staff really do not want to use it. This is particularly evident in the sales department. They will only really use it for what they really have to use it for: making quotes, so we lose out. Customer data does not get sufficiently recorded, project details are lacking, contacts are hard to look up, customer account history is never recorded (we can't even find the field to put that in). Other systems we used before, e.g. Zoho CRM, Pipedrive and even Excel, are easy to use and therefore get used by the staff. A system such as Netsuite might have a beautifully coded backend, but if it discourages use through extreme user-unfriendliness, it becomes an almost useless system.

We have been able to speed up and automate a lot of processes with our customizations, on top of what Netsuite includes and with new modules we have developed within Netsuite that integrate with the rest of them. Our instance is a monster now, and we've done it quickly and efficiently thanks to the API.