I worked with Oloop llc for almost 4 years. And recently parted my ways and took a full time opportunity due to some personal reasons. If I ever look back into consulting. My first stop will be Oloop again. I started my career after my masters degree with them and almost worked for 7 different clients across US during my 4 year term with them. Never had any real issues.
They are very direct and ethical and tell you that upfront and on the face most of the times unlike other consulting firms. They motivated me and guided me through my career to progress both professionally and personally.They always push you out of your comfort zone to do better which when i turn back had a huge positive effect on my career overall.
Kontras
Never had any real issues. If you have any, they are really good people to talk to and very reasonable and ethical. They will tell you upfront what can be done and what can't be done. So you can take your decisions.