In the last four to five weeks I've unlocked 4x Moto G smartphones (locked to Koodo, Canada).
Cellunlocker.net emailed the unlock code/s to me within an hour after order and payment, each time, even though their delivery commitment was 12-24 hours, so I am impressed with the quick turnaround.
On the last unlock, which I did 3 weeks after the previous one, I didn't remember the unlock code is always an 8-character number, so I tried to unlock using what I thought was one 16-character code, which obviously failed. I emailed them to ask what could be wrong. They responded in less than 2 hours with a checklist. After reading the checklist, I finally figured out that the unlock code emailed to me was actually two 8-character numbers placed very close to each other. I used the first 8-character number and *success*.
It seems they may get confirmation their end once the IMEI is successfully unlocked, and they followed up shortly afterwards with an enquiry to ask whether I had solved the problem, and a request to recommend them if I am happy with their service.
Given that I was 10 time zones east of Vancouver when I corresponded with them, and they replied so quickly, it means they must be dealing with emails through day and night --- impressive!
It cost me $14.99 all in (around CAD 20.00) for each unlock. If I got my own service provider (Koodo in Canada) to do the same thing, it would have cost me CAD 40.00 with taxes per unlock, and probably a wait of 3-7 days!
These guys have found a market niche that they seem to service very well. Before making the first purchase, I read some poor reviews, and was a little hesitant. After 4 separate, successful unlocks, I can only say good things about them!