Pros
Glasshouse is a small Vendor Neutral IT constultantcy, so you do get exposure to all sorts of different Hardware and software. Small company allows for a really lateral structure, not uncommon to catch the CEO COO CFO, etc in the hall way for a quick chat. Flexable hours, as most of the work is scheduled around the customers IT off hours.
Cons
No real transfer of knowledge between technical folks. They certainly talked a good game about all the expertise, and knowledge they could provide, but actually delivering this was something else. No doubt there were people who know there stuff, but there is no doubt that they got that knowledge prior to entering Glasshouse, and had no incentive in sharing this knowldege throughout the enterprise. Do not look for much development, unless your intrested in just learning it on your own.