I'm just in the process of making a decision about go forward with colocation. Currently we have 1u with ICONZ but this will be expanding to 3u ASAP and 8u next month probably topping off around 12-15u in May as we move servers from our office to the Datacenter. This is my current Pro/Con list.
Pros:
- Much cheaper than ICONZ (who are $130/month per RU while Orcon is like $50/month)
- Same supplier as our office internet so possibly less likely to lose connectivity
- Increased business with same supplier gives us more "buyer power"
- Pool international bandwidth (which will save around $300/month)
- Our account manager at Orcon is HEAPS better than the guy at ICONZ
Cons:
- Bad reviews about Orcon colo (especially from Magu) with problems in getting access and status updates during downtime
- Further away (we are in Penrose and they are on the Shore while ICONZ is in CBD)
- Seem to have to pay for access unless you have a full cabinet while ICONZ is free
- They had a major power outage, never had issues with ICONZ
- Don't seem to peer at APE/WIX with IPv6
So yea, there are a variety of factors that will help us decide. Input from current/past/future customers or anyone who has considered them is appreciated :)