What does it do?

Excellent question! Perhaps this beautiful list of features will help you choose.

Key Functionality Pro+ Enterprise
Use on browser (PC, Mac, Smartphone and Tablet) ✓ ✓
Online Support ✓ ✓
Telephone Support ✗ ✓
On-site Training ✗ ✓
Asset Management Pro+ Enterprise
Asset Profiles ✓ ✓
Access Profiles by Scanning QR Codes ✓ ✓
Kits, Components and Assembly Profiles ✓ ✓
Manage or Group by Models ✓ ✓
Full Asset History ✓ ✓
Asset Inspections ✓ ✓
Warranty Information ✓ ✓
Images ✓ ✓
Purchase & Depreciation (Asset Register) ✓ ✓
Contact Owner ✓ ✓
Fault Reporting and Management ✓ ✓
Group by Categories ✓ ✓
Custom Model Personalities ✓ ✓
Stock Level Management ✓ ✓
Batch Updating / Import ✓ ✓
Custom Asset Properties ✗ ✓
iPad / iPhone (iOS) App ✓ ✓
Inspections Pro+ Enterprise
Library of Common Inspections:
  LOLER ✓ ✓
  PAT (manual and automatic from a number of popular testers) ✓ ✓
  Visual Inspection ✓ ✓
  Annual Service ✓ ✓
  MOT ✓ ✓
  Lamp Hours ✓ ✓
Custom Inspections ✓ ✓
Comprehensive Management and Reporting ✓ ✓
Expiry by Date and/or Usage ✓ ✓
Generate Certificates ✓ ✓
Secure and Robust with Comprehensive Audit Trail ✓ ✓
Batch Import Inspections ✓ ✓
Run Inspection from Web Browser, Barcode Scanner or iOS App ✓ ✓
Barcode Scanners (Separate Purchase) Pro+ Enterprise
Industrial Grade Scanners ✓ ✓
Bluetooth Barcode Scanners (for iOS App) ✓ ✓
Functionality:
  Pick or Dispatch Stock ✓ ✓
  Return Stock ✓ ✓
  Stock Count ✓ ✓
  Inspections ✓ ✓
  Custom Business Flows ✗ ✓
Contact Management Pro+ Enterprise
Contacts ✓ ✓
Grouped Contacts ✓ ✓
Book Jobs against Contacts ✓ ✓
Client Ledger ✗ ✓
Document Management Pro+ Enterprise
Attach to Assets ✓ ✓
Attach to Contacts ✓ ✓
Integration Pro+ Enterprise
Export data in common formats ✓ ✓
Batch Import optional ✓
Import from PAT Testers ✓ ✓
Email Inbox for Assets ✗ ✓
Email Journaling ✗ ✓
RESTful API ✗ ✓
Job, Booking and Rental Management Pro+ Enterprise
Assign Labelled Assets to Jobs ✓ ✓
Assign Parts and Non-Labelled Assets to Jobs ✓ ✓
Assign Assemblies to Jobs ✓ ✓
Assign Kits to Jobs ✓ ✓
Assign People to Jobs ✓ ✓
Basic Booking Types ✓ ✓
Advanced Booking Types ✓ ✓
Custom Booking Types ✗ ✓
Comprehensive Job Rules Engine ✓ ✓
Availability Checking ✓ ✓
Alternatives ✓ ✓
Accessories ✓ ✓
Shortage Notifications ✓ ✓
Pricing Engine ✓ ✓
Pricing Engine - Advanced (Excel) ✗ ✓
Integration with Xero ✗ ✓
Sub-Hires ✗ ✓
Cross Hires ✗ ✓
Early Prep ✗ ✓
Job Documents:
  Pick List ✓ ✓
  Dispatch Notes ✓ ✓
  Safety Certificates for Items on Job ✓ ✓
  Invoice ✓ ✓
  Carnet ✗ ✓
  Crew Manifest ✓ ✓
  Custom Documents Using MS Word Templates ✓ ✓
Project Management Pro+ Enterprise
Sub Jobs ✗ ✓
Timesheets ✗ ✓
Crew Booking ✗ ✓
Location Management Pro+ Enterprise
Locations ✓ ✓
Sites ✓ ✓
GPS Tracking ✓ ✓
Reporting Pro+ Enterprise
Core Reports ✓ ✓
Dashboard ✓ ✓
Text, CSV, Excel, PDF, HTML Format ✓ ✓
Custom Mail Merge Documents ✗ ✓
Custom Reports ✗ ✓
Reports(templates / market place) ✓ ✓
Task Management Pro+ Enterprise
Assign to Contacts ✓ ✓
Create from Asset ✓ ✓
Create from Job ✓ ✓
Assign to Groups ✗ ✓
Auto-Creation from Report ✗ ✓
User Management and Security Pro+ Enterprise
Activity Log ✓ ✓
Manage by User Groups ✓ ✓
Standard Security Profiles/Roles ✓ ✓
Custom Security Profiles/Roles ✗ ✓
Assign Permissions/Roles to User Groups ✓ ✓
Notifications Pro+ Enterprise
Email Alerts ✓ ✓
SMS Alerts ✗ ✓*
Labels Pro+ Enterprise
trackingThis Supplied ✓* ✓*
Use Existing / Customer Supplied ✓* ✓*