diff --git a/yapapi/log.py b/yapapi/log.py
index 769b7bf06..27c857ad1 100644
--- a/yapapi/log.py
+++ b/yapapi/log.py
@@ -41,10 +41,9 @@
     )
 ```
 """
-from collections import defaultdict
+from collections import defaultdict, Counter
 from dataclasses import asdict
 import itertools
-import json
 import logging
 import time
 from typing import Any, Callable, Dict, Iterator, List, Optional, Set
@@ -169,10 +168,10 @@ class SummaryLogger:
     `wrapped_emitter`.
 
     For example, with the following setup, each event emitted by `engine`
-    will be logged by `log_event_json`, and additionally, certain events
+    will be logged by `log_event_repr`, and additionally, certain events
     will cause summary messages to be logged.
     ```
-        detailed_logger = log_event_json
+        detailed_logger = log_event_repr
         summary_logger = SummaryLogger(wrapped_emitter=detailed_logger).log
         engine = Engine(..., event_emitter=summary_logger)
     ```
@@ -186,6 +185,9 @@ class SummaryLogger:
     # Start time of the computation
     start_time: float
 
+    # Maps received proposal ids to provider ids
+    received_proposals: Dict[str, str]
+
     # Set of confirmed proposal ids
     confirmed_proposals: Set[str]
 
@@ -204,6 +206,9 @@ class SummaryLogger:
     # Map a provider name to the sum of amounts in this provider's invoices
     provider_cost: Dict[str, float]
 
+    # Count how many times a worker failed on a provider
+    provider_failures: Dict[str, int]
+
     # Has computation finished?
     finished: bool
 
@@ -218,12 +223,14 @@ def _reset(self) -> None:
         """Reset all information aggregated by this logger."""
 
         self.start_time = time.time()
+        self.received_proposals = {}
         self.confirmed_proposals = set()
         self.agreement_provider_name = {}
         self.confirmed_agreements = set()
         self.task_data = {}
         self.provider_tasks = defaultdict(list)
         self.provider_cost = {}
+        self.provider_failures = Counter()
         self.finished = False
         self.error_occurred = False
 
@@ -259,10 +266,16 @@ def _handle(self, event: events.Event):
         if isinstance(event, events.SubscriptionCreated):
             self.logger.info(event_type_to_string[type(event)])
 
+        elif isinstance(event, events.ProposalReceived):
+            self.received_proposals[event.prop_id] = event.provider_id
+
         elif isinstance(event, events.ProposalConfirmed):
             self.confirmed_proposals.add(event.prop_id)
+            confirmed_providers = set(
+                self.received_proposals[prop_id] for prop_id in self.confirmed_proposals
+            )
             self.logger.info(
-                "Received proposals from %s providers so far", len(self.confirmed_proposals)
+                "Received proposals from %s providers so far", len(confirmed_providers)
             )
 
         elif isinstance(event, events.AgreementCreated):
@@ -306,15 +319,35 @@ def _handle(self, event: events.Event):
             self.provider_cost[provider_name] = cost
             self._print_total_cost()
 
+        elif isinstance(event, events.WorkerFinished):
+            if event.exception is None:
+                return
+            exc_type, exc, tb = event.exception
+            provider_name = self.agreement_provider_name[event.agr_id]
+            self.provider_failures[provider_name] += 1
+            self.logger.warning("Activity failed on provider '%s', reason: %r", provider_name, exc)
+
         elif isinstance(event, events.ComputationFinished):
             self.finished = True
             total_time = time.time() - self.start_time
             self.logger.info(f"Computation finished in {total_time:.1f}s")
+            agreement_providers = {
+                self.agreement_provider_name[agr_id] for agr_id in self.confirmed_agreements
+            }
             self.logger.info(
-                "Negotiated agreements with %s providers", len(self.confirmed_agreements)
+                "Negotiated %s agreements with %s providers",
+                len(self.confirmed_agreements),
+                len(agreement_providers),
             )
             for provider_name, tasks in self.provider_tasks.items():
                 self.logger.info("Provider '%s' computed %s tasks", provider_name, len(tasks))
+            for provider_name in set(self.agreement_provider_name.values()):
+                if provider_name not in self.provider_tasks:
+                    self.logger.info("Provider '%s' did not compute any tasks", provider_name)
+            for provider_name, count in self.provider_failures.items():
+                self.logger.info(
+                    "Activity failed %s time(s) on provider '%s'", count, provider_name
+                )
             self._print_total_cost()